JP4982096B2 - Reception device, color correction method, and color correction program - Google Patents

Description

  The present invention relates to a receiving apparatus that receives image data.

  In terrestrial digital broadcasting (ISDB-T: Integrated Services Digital Broadcasting-Terrestrial), the transmission band allocated to each broadcasting station is divided into a number of segments, and multiple layers composed of one or more segments are transmitted simultaneously. Carrier transmission is planned. For multi-carrier transmission of terrestrial digital broadcasting, an Orthogonal Frequency Division Multiplexing (OFDM) system is used.

  In such terrestrial digital broadcasting, the transmission band assigned to each broadcasting station is divided into 13 segments, and 12 segments out of the 13 segments are used for high definition (HDTV: High Definition Television). Broadcasting video and broadcasting video for mobile terminals using one segment is considered.

  A high-definition video broadcast using 12 segments can transmit a large amount of data and can display a high-quality image, but is difficult to receive in a place with a poor radio wave environment. On the other hand, a video for a mobile terminal that broadcasts using one segment does not have a large amount of data to be transmitted, but can be easily received even in a place with a poor radio wave environment.

  Patent Document 1 describes a technique related to a mobile reception terminal that receives terrestrial digital broadcasting. The mobile receiving terminal described in Patent Document 1 outputs a high-definition video in normal times, and switches the video to be output to a video for a mobile terminal when the radio wave environment deteriorates.

JP 2003-274302 A

  In terrestrial digital broadcasting, image data of high-definition video broadcast using 12 segments is encoded by MPEG2-VIDEO. Also, image data for video for mobile terminals that broadcast using one segment is H.264. H.264 encoded. Furthermore, the image data of the high-definition video broadcast using 12 segments and the image data of the video for mobile terminals broadcast using one segment are transmitted by a device through which the data is transmitted. Different. Due to such differences in encoding method, route to transmission, etc., high-definition video broadcast using 12 segments and video for mobile terminals broadcast using one segment are: Even if it is received and output by the same device, the colors showing the same scene may be different. In such a case, when switching between a high-definition video broadcast using 12 segments and a video for a mobile terminal broadcast using one segment as in the technique of Patent Document 1 described above, Since the color changes in spite of the moving image of the continuous frame images, the viewer feels uncomfortable visually.

  The present invention has been made in view of such circumstances, and even when switching between high-definition video broadcast using 12 segments and video for mobile terminals broadcast using one segment, An object is to provide a technique that does not cause a color change.

  The present invention has been made to achieve the above-described object. When switching images transmitted by different methods, the color difference between an image of one method and an image of the other method is acquired, and the color is obtained. It is characterized in that the color of the image is corrected in accordance with the difference between them and output.

In addition, the present invention is a receiving apparatus that receives image data of the same video in different systems and switches the image data output to the output means from image data of the first system to image data of the second system. , Synchronization detection means for determining whether or not the frame image of the image data of the first method and the frame image of the image data of the second method are displaying the same image, and the same image is displayed by the determination Difference acquisition means for acquiring a color difference between the color of the frame image of the image data of the first method determined to be the color of the frame image of the image data of the second method, and the acquired color A correction unit that corrects the color of the frame image of the image data of the second method in accordance with the difference, and a switching unit that outputs the corrected image data of the second method to the output unit. Characterize

  According to the technique of the present invention, it is possible to prevent a color change from occurring even when an image transmitted by a different method is switched. Thereby, it is possible to prevent the user from feeling uncomfortable viewing.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. The technique of the present embodiment is effective when one receiving apparatus receives image data transmitted by two or more different methods and switches these data. In the following description, the reception device receives high-definition video data broadcast using 12 segments of terrestrial digital broadcasting and video data for mobile terminals broadcast using one segment. An example of switching and outputting will be described, but the present invention is not limited to this. For example, when a single receiving device switches and outputs DVB-T (Digital Video Broadcasting-Terrestrial) data and DVB-H (Digital Video Broadcasting-Handheld) data, or broadcast data and communication data such as the Internet. This is effective when switching and outputting.

  First, a configuration example of the receiving apparatus according to the present embodiment will be described with reference to FIG.

  In FIG. 1, a receiving device 1 is a device capable of receiving terrestrial digital broadcasting. The receiving device 1 is not particularly limited, and is, for example, a portable terminal capable of receiving terrestrial digital broadcasting, a navigation system, a TV, a tuner, or the like. Since the receiving device 1 switches and outputs high-definition video data broadcast using 12 segments and video data for mobile terminals broadcast using one segment, It is more useful to apply to the case where the reception status of terrestrial digital broadcasting changes due to, for example, the change of. Hereinafter, high-definition video data broadcast using 12 segments is referred to as HDTV data. Also, video data for mobile terminals that broadcast using one segment is H.264. H.264 data.

  The receiving device 1 includes an antenna 101, a tuner 102, an OFDM (Orthogonal Frequency Division Multiplexing) demodulating unit 103, a processing unit 104, a RAM 105, a ROM 106, a storage device 107, an input interface 108, an output interface 109, a communication interface 110, and the like. The antenna 101, tuner 102, OFDM demodulator 103, processor 104, RAM 105, ROM 106, storage device 107, input interface 108, output interface 109, communication interface 110, etc. are connected via a bus 120.

  The processing unit 104 is, for example, a system LSI (Large Scale Integration).

  The storage device 107 is, for example, an HDD (Hard Disk Drive), a CD-R (Compact Disc-Recordable), a DVD-RAM (Digital Versatile Disk-Random Access Memory), etc. Device.

  An input device 121 and the like are connected to the input interface 108. The input device 121 is, for example, a button, a remote control and a remote control receiving unit, a touch panel, or the like.

  An output device such as a display and a speaker (not shown) is connected to the output interface 109.

  The receiving device 1 is connected to a communication network (not shown) via the communication interface 110. The receiving device 1 may be connected to an information terminal (not shown) via this communication network and accept input of instruction information and the like which will be described later.

  Broadcast radio waves of terrestrial digital broadcasting are input to the receiver 1 via the antenna 101 and the tuner 102, demodulated by the OFDM demodulator 103, separated, color corrected, output switched, etc. by the processor 104, and output interface From 109, it is output as video data and audio data. Although the antenna 101, the tuner 102, the OFDM demodulator 103, the RAM 105, the ROM 106, the storage device 107, the input interface 108, the output interface 109, the communication interface 110, and the like of the receiving device 1 are the same as those in the conventional technology, Only the part differs from the prior art.

  FIG. 2 shows a configuration example of the processing unit 104.

  2, the processing unit 104 includes a reception state detection unit 201, a reception state detection condition holding unit 202, a DEMUX (De-MUltipleXer) 203, a decoder 204, a drawing processing unit 205, a frame buffer 206, a decoder 207, and a drawing processing unit 208. A frame buffer 209, a synchronization unit 210, a synchronization condition holding unit 211, a color information acquisition unit 212, an acquisition condition storage unit 213, a color difference acquisition unit 214, a correction unit 215, a switching unit 216, a setting reception unit 217, and the like.

  The reception state detection condition holding unit 202 includes HDTV data and H.264 data. The condition for switching to H.264 data is held. The reception state detection unit 201 follows the conditions in the reception state detection condition holding unit 202 with the HDTV data and the H.264 data. It is determined whether or not to switch to H.264 data.

  The DEMUX 203 separates the data demodulated by the OFDM demodulator 103. The decoder 204 decodes HDTV data. The drawing processing unit 205 draws HDTV data in the frame buffer 206. The decoder 207 is an H.264 decoder. H.264 data is decoded. The drawing processing unit 208 is an H.264 processor. H.264 data is drawn in the frame buffer 209.

  The synchronization unit 210 follows the conditions held in the synchronization condition holding unit 211 according to the HDTV data and the H.264 data. With H.264 data, the same frame image is selected. The synchronization unit 210 instructs the color information acquisition unit 212 to display a frame image showing the same video, and instructs the switching unit 216 about the switching timing.

  In accordance with the conditions in the acquisition condition holding unit 213, the color information acquisition unit 212 performs a frame image based on HDTV data, H.264, and H.264. Each pixel of the frame image based on H.264 data is searched to obtain the color of each frame image. Here, when searching for a frame image based on HDTV data, the color information acquisition unit 212 acquires “6 * 6” pixels as one unit and acquires a value obtained by averaging the colors of the pixels constituting the unit. Shall. In addition, the color information acquisition unit 212 includes When searching for a frame image based on H.264 data, one pixel is taken as one unit, and the color of the pixel is acquired for each unit. The color acquired here is not particularly limited, but the luminance of the pixel is acquired here. The color difference acquisition unit 214 calculates the color difference acquired by the color information acquisition unit 212. The correction unit 215 corrects the color of the frame image in the frame buffer 209 according to the color difference acquired by the color difference acquisition unit 214. The switching unit 216 switches the output between the frame image in the frame buffer 206 and the frame image in the frame buffer 209 in accordance with an instruction from the synchronization unit 210. The setting reception unit 217 registers and updates information in the synchronization condition holding unit 211, the acquisition condition holding unit 213, and the like according to information input via the input device 121 or the communication interface 110.

  The DEMUX 203, the decoder 204, the decoder 207, the drawing processing unit 205, the drawing processing unit 208, the frame buffer 206, the frame buffer 209, the reception state detection condition holding unit 202, the reception state detection unit 201, and the like are the same as those in the conventional technology. is there.

  In addition, the synchronization unit 210 receives HDTV data and H.264 data. An operation example for selecting a frame image of the same video with H.264 data is not particularly limited. In order for the synchronization unit 210 to select a frame image of the same video, for example, the time stamp (reproduction time) included in the HDTV data, Although the determination may be made based on whether or not the difference from the time stamp included in the H.264 data is within a predetermined value, here, the motion vector included in the HDTV data, It is determined by the inner product with the motion vector included in the H.264 data. Details of this determination operation will be described later.

  The synchronization unit 210 includes a search unit 251, a time stamp acquisition unit 252, and a neighborhood frame search unit 253. The search unit 251 includes the motion vector included in the HDTV data, The candidate of the frame image to be switched is acquired by the inner product with the motion vector included in the H.264 data. The time stamp acquisition unit 252 acquires the time stamp of the frame image. The neighboring frame search unit 253 selects a frame image to be switched from the candidate frame image to be switched acquired by the search unit 251 and the time stamp acquired by the time stamp acquisition unit 252.

  The reception state detection unit 201, the drawing processing unit 205, the drawing processing unit 208, the synchronization unit 210, the color information acquisition unit 212, the color difference acquisition unit 214, the correction unit 215, the switching unit 216, the setting reception unit 217, etc. A program loaded from (not shown) may be realized by executing an arithmetic device (not shown) in the processing unit 104, or may be dedicated hardware or the like.

  Also, FIG. 2 does not include a configuration for decoding and outputting audio data, but this configuration is the same as that of the prior art, and is omitted here.

  Next, condition information held by the holding unit will be described.

  First, the reception state detection condition holding unit 202 will be described.

  The reception state detection condition holding unit 202 determines that the data output from the output interface 109 is HDTV data, A threshold value or the like for determining whether to use H.264 data is stored. Here, this threshold value is assumed to be the electric field strength. Information in the reception state detection condition holding unit 202 is assumed to be stored in advance, but may be newly stored, updated, or the like according to information input from the input device 121 or the communication interface 110.

  Next, an example of conditions in the synchronization condition holding unit 211 will be described with reference to FIG.

  In the synchronization condition holding unit 211, a table 301 shown as an example in FIG. 3 is stored. In FIG. 3, a table 301 includes a threshold type 311 and a threshold 312. The threshold type 311 and the threshold value 312 are associated with each other. The threshold type 311 is a threshold type. In the example of FIG. 3, the threshold type 311 “synchronization threshold” is a threshold of a time stamp of a frame image acquired by an operation described later. The threshold type 311 “inner product threshold” is a threshold of an inner product of motion vectors acquired by an operation described later. The threshold type 311 “difference threshold value” is a threshold value of a square error acquired by an operation described later. The threshold 312 is a threshold of the corresponding threshold type 311.

  Information in the synchronization condition holding unit 211 is newly stored and updated by an operation example described later.

  Information in the acquisition condition holding unit 213 will be described.

  The acquisition condition holding unit 213 includes a frame image based on HDTV data, an It holds setting information for searching for pixels for obtaining a luminance difference from a frame image based on H.264 data. In the present embodiment, description will be made assuming that there are three types of setting information for searching for a pixel for acquiring a luminance difference: an all luminance acquisition mode, a central luminance acquisition mode, and a random luminance acquisition mode. The setting information in the acquisition condition holding unit 213 is newly stored, updated, etc. according to an operation example described later.

  Here, the full luminance acquisition mode, the central luminance acquisition mode, and the random luminance acquisition mode will be described with reference to the drawings.

  First, the total luminance acquisition mode will be described with reference to FIG.

  In FIG. 4A, a frame image 401 indicates a frame image based on HDTV data. The number of pixels of the frame image by HDTV data is 1080 on the vertical axis and 1920 on the horizontal axis. In FIG. 4B, the frame image 411 is an H.264 image. The frame image by H.264 data is shown. H. The number of pixels of the frame image based on H.264 data is 180 on the vertical axis and 320 on the horizontal axis.

  In the all luminance acquisition mode, the color information acquisition unit 212 searches all the pixels of the frame image 401 and the frame image 411 and acquires the luminance of each pixel. That is, the color information acquisition unit 212 sets “6 * 6” pixels as one unit for all the pixels constituting the frame image 401 in FIG. 4A, and the luminance of each pixel constituting the unit. Get the average value of. Specifically, for example, when the pixel position is indicated by any one of “(1, 1)” to “(X, Y)”, the color information acquisition unit 212 first sets the diagonal to “ The average value of the luminance of the pixels in the region 402 indicated by (1, 1) ”and“ (6, 6) ”is acquired, and then the diagonals are“ (7, 1) ”and“ (6, 12 ) ”Is repeated to obtain the average luminance value of the pixels in the region indicated by“ ”. In addition, the color information acquisition unit 212 acquires the luminance of the pixel for each unit, with one pixel as one unit for all the pixels constituting the frame image 411 in FIG. Specifically, for example, the color information acquisition unit 212 first acquires the luminance of the pixel 412 at the position “(1, 1)”, and then acquires the luminance of the pixel at the position “(1, 2)”. The process of acquiring is repeated.

  The center luminance acquisition mode will be described with reference to FIG.

  In FIG. 5A, a frame image 501 indicates a frame image based on HDTV data. The number of pixels of the frame image by HDTV data is the same as described above. In FIG. 5B, the frame image 511 is an H.264 image. The frame image by H.264 data is shown. H. The number of pixels of the frame image based on H.264 data is the same as described above.

  In the central luminance acquisition mode, the color information acquisition unit 212 searches the central pixel of each of the frame image 501 and the frame image 511 to acquire the luminance of each pixel. That is, the color information acquisition unit 212 sets “6 * 6” pixels as one unit for the pixels in the predetermined area 502 in the center of the frame image 501 in FIG. A value obtained by averaging the luminance of pixels is acquired. Specifically, for example, as described above, the pixel position is indicated by any one of “(1, 1)” to “(X, Y)”, and the diagonal pixel position of the predetermined region 502 is “ In the case of (Xc1, Yc1) − (Xc2, Yc2) ”, the color information acquisition unit 212 first has a diagonal of“ (Xc1, Yc1) ”and“ (Xc1 + 5, Yc1 + 5) ”in the region 503 indicated by The process of acquiring the average value of the luminance of the pixels, and then acquiring the average value of the luminances of the pixels in the regions whose diagonals are indicated by “(Xc1 + 6, Xc1)” and “(Xc1 + 5, Xc1 + 11)” repeat. Further, the color information acquisition unit 212 acquires one pixel as one unit for the pixels in the predetermined area 512 in the center of the frame image 511 in FIG. 5B, and acquires the luminance of the pixel for each unit. . Specifically, for example, the color information acquisition unit 212 first acquires the luminance of the pixel 513 at the position “(Xc1, Yc1)”, and then acquires the luminance of the pixel at the position “(Xc1, Yc1 + 1)”. The process of acquiring is repeated.

  The random luminance acquisition mode will be described with reference to FIG.

  In FIG. 6A, a frame image 601 indicates a frame image based on HDTV data. The number of pixels of the frame image by HDTV data is the same as described above. In FIG. 6B, the frame image 611 is an H.264 image. The frame image by H.264 data is shown. H. The number of pixels of the frame image based on H.264 data is the same as described above.

  In the random luminance acquisition mode, the color information acquisition unit 212 acquires the luminance of the randomly selected pixel for each of the frame image 601 and the frame image 611 by issuing a pseudo random number or the like. In other words, the color information acquisition unit 212 uses “6 * 6” pixels based on randomly selected pixels as a unit for the frame image 601 in FIG. A value obtained by averaging the luminance of pixels is acquired. The position of the randomly selected pixel 602 may be, for example, within “6 * 6” areas 603 as shown in FIG. 6A, or may be an arbitrary position outside this area 603. The color information acquisition unit 212 performs such processing a predetermined number of times. In addition, the color information acquisition unit 212 acquires the luminance of the pixel 612 and the pixel 613 selected at random from the frame image 611 in FIG. The color information acquisition unit 212 performs such processing a predetermined number of times.

  Next, an operation example will be described.

  First, an operation example of setting the luminance acquisition mode in the acquisition condition holding unit 213 will be described with reference to FIG. When the user instructs the luminance acquisition mode setting using the input device 121 or an input device of an information terminal (not shown), the setting reception unit 217 activates the following operation.

  In FIG. 7, the setting reception unit 217 receives an input of the luminance acquisition mode (S701). For this purpose, the setting receiving unit 217 outputs, for example, screen data for receiving an input of the luminance acquisition mode to the output interface 109 or the communication interface 110. In FIG. 8, a screen 801 is displayed on an output device (not shown) such as a display. Using the input device 121 or an input device of an information terminal (not shown), the user selects one of the radio buttons 811 to 813, designates the luminance acquisition mode to be set, and instructs the input of the information. As a result, information indicating the luminance acquisition mode is input from the input device 121 or the communication interface 110.

  When information indicating the luminance acquisition mode is input from the input device 121 or the communication interface 110, the setting reception unit 217 stores the input setting information indicating the luminance acquisition mode in the acquisition condition holding unit 213 (S702). .

  Next, an operation example for setting the synchronization determination condition in the synchronization condition holding unit 211 will be described. This operation example is different from the setting of the luminance acquisition mode described above only in the information to be set, and will be described with reference to the same FIG. When the user instructs the luminance acquisition mode setting using the input device 121 or an input device of an information terminal (not shown), the setting reception unit 217 activates the following operation.

  In FIG. 7, the setting reception unit 217 receives an input of a synchronization determination condition (S701). For this purpose, the setting reception unit 217 outputs, for example, screen data for receiving an input of the synchronization determination condition to the output interface 109 or the communication interface 110. In FIG. 9, a screen 901 is displayed on an output device such as a display. The user uses the input device 121 or an input device of an information terminal (not shown) to input an arbitrary numerical value in each of the areas 911 to 913 to designate a threshold value for the synchronization determination condition and instruct to input this information. . As a result, the synchronization determination condition information is input from the input device 121 or the communication interface 110.

  When synchronization determination condition information is input from the input device 121 or the communication interface 110, the setting reception unit 217 stores the input synchronization determination condition information in the synchronization condition holding unit 211 (S702). Specifically, for example, the setting reception unit 217 stores the value input in the area 911 in FIG. 9 in the threshold 312 corresponding to the threshold type 311 “synchronization threshold” in the table 301 in the synchronization condition holding unit 211. To do. Further, the setting reception unit 217 stores the value input in the area 912 of FIG. 9 in the threshold 312 corresponding to the threshold type 311 “inner product threshold” of the table 301 in the synchronization condition holding unit 211. The setting reception unit 217 stores the value input in the area 913 in FIG. 9 in the threshold 312 corresponding to the threshold type 311 “difference threshold” in the table 301 in the synchronization condition holding unit 211.

  Next, output of an image by HDTV data; An example of the operation for determining whether to switch the image output based on H.264 data will be described with reference to FIG. This operation is, for example, an operation that is activated when the receiving device 1 is activated or at predetermined time intervals.

  In FIG. 10, the reception state detection unit 201 first acquires the electric field strength due to the radio wave received by the antenna 101 (S1001). Next, the reception state detection unit 201 reads a threshold value from the reception state detection condition holding unit 202 (S1002). The reception state detection unit 201 determines whether or not the electric field intensity acquired in S1001 is equal to or less than the threshold value read in S1002 (S1003).

  As a result of the determination in S1003, if the electric field strength acquired in S1001 is not less than or equal to the threshold value read in S1002, the reception state detection unit 201 selects HDTV data (S1004).

  As a result of the determination in S1003, if the electric field strength acquired in S1001 is equal to or less than the threshold value read in S1002, the reception state detection unit 201 determines that the H.264 reception is not performed. H.264 data is selected (S1005).

  The reception state detection unit 201 outputs information indicating the data selected in S1004 or S1005 to the synchronization unit 210, the color information acquisition unit 212, and the like (S1006). The information indicating the selected data may be, for example, ON or OFF of a flag.

  Next, HDTV data and H.264 data. An operation example for synchronizing with H.264 data will be described. This operation is activated when, for example, information indicating the selected data is newly input or when information different from that is input by the operation of the reception state detection unit 201 described above. .

  First, referring to FIG. An outline of an operation example for synchronizing with H.264 data will be described.

  In FIG. 11, the search unit 251 of the synchronization unit 210 includes the motion vector of HDTV data, From the inner product of the motion vector of H.264 data, a frame image of HDTV data showing the same video, A frame image of H.264 data is detected (S1101). Details of this operation example will be described later.

  Next, the neighborhood frame search unit 253 determines from the information input from the reception state detection unit 201, from the frame image based on the HDTV data, H.264. It is determined whether or not the frame image is switched to H.264 data (S1102).

  As a result of the determination in step S1102, the H. In the case of switching to a frame image based on H.264 data, the neighboring frame search unit 253 determines that the frame image of the HDTV data determined to be the same image by the search unit 251 and the same image by the search unit 251 H. A frame image next to the frame image of H.264 data is selected (S1103).

  As a result of the determination in step S1102, the H. If the frame image is not switched to H.264 data, the neighboring frame search unit 253 determines that the H.264 image is determined to be the same image by the search unit 251. A frame image of H.264 data and a frame image next to the frame image of HDTV data determined to be the same image by the search unit 251 are selected (S1104).

  Hereinafter, the last frame image output before switching is referred to as a switching target frame image, and the first frame image output immediately after switching is referred to as a switching frame image. Therefore, for example, as a result of the determination in S1102 described above, from the frame image by HDTV data, In the case of switching to a frame image based on H.264 data, the frame image of the HDTV data determined to be the same image by the search unit 251 is referred to as a switching target frame image, and the H image determined to be the same image by the search unit 251 . The next frame image after the H.264 data frame image is referred to as a switching frame image. Further, for example, as a result of the determination in S1102, from the frame image based on HDTV data, H. If the frame image is not switched to H.264 data, the search unit 251 determines that the images are the same. A frame image of H.264 data is referred to as a switching target frame image, and a frame image next to the HDTV data frame image determined by the search unit 251 as the same image is referred to as a switching frame image.

  The neighboring frame search unit 253 instructs the time stamp acquisition unit 252 to acquire the time stamp (reproduction time) of the switching target frame image. The time stamp acquisition unit 252 acquires the time stamp of the switching target frame image in accordance with the instruction. The neighborhood frame search unit 253 sets the time stamp value of the switching target frame image acquired by the time stamp acquisition unit 252 to “T1” (S1105). Further, the neighboring frame search unit 253 instructs the time stamp acquisition unit 252 to acquire the time stamp of the switching frame image. The time stamp acquisition unit 252 acquires the time stamp of the switching frame image according to the instruction. The neighboring frame search unit 253 sets “T2” as the time stamp value of the switching frame image acquired by the time stamp acquisition unit 252 (S1106). The neighboring frame search unit 253 calculates “ΔT = T1−T2” (S1107), and determines whether or not “ΔT <synchronization threshold” (S1108). For this purpose, the neighboring frame search unit 253 reads the value of the threshold 312 associated with the threshold type 311 “synchronization threshold” from the table 303 of the synchronization condition holding unit 211, and this value is calculated in the above-described S1107. It is determined whether or not the value is greater than “ΔT”.

  If the result of the determination in S1108 is “ΔT <synchronization threshold”, the neighboring frame search unit 253 discards the rendering of the switching frame image (S1109), and the next frame image of the switching frame image is a new switching frame image. (S1110), the processing after S1105 is performed again.

  If the result of determination in S1108 is not “ΔT <synchronization threshold”, the neighboring frame search unit 253 instructs the switching unit 216 to perform rendering of the switching frame image after rendering of the switching target frame image (S1111). ). This instruction may be arbitrary. For example, the frame buffer output by the neighboring frame search unit 253 after the switching unit 216 renders the switching target frame image and then the next frame image is rendered. A flag or the like for instructing switching may be output.

  Here, the operations from S1105 to S1111 will be described with reference to FIG.

  In FIG. 12, “P” indicates frame images that are continuously output. Each “P” that is continuous in the horizontal direction is a frame image based on HDTV data, and H.264. A frame image based on H.264 data and a frame image output to a display or the like and reproduced. In the example of FIG. 12, “P” indicating a frame image is arranged according to the reproduction time. For example, a frame image 1201 based on HDTV data, A frame image 1211 based on H.264 data indicates that the frame images have the same reproduction time.

  As described above, the switching unit 216 determines whether the frame image based on HDTV data or H.264 depends on whether the electric field strength is equal to or less than the threshold value. Switching to output any of the frame images based on H.264 data. In the following, from the frame image by HDTV data, H. An example of switching to a frame image based on H.264 data will be described. For example, it is assumed that when outputting a frame image 1202 based on HDTV data, the electric field strength is equal to or lower than a threshold value and information for instructing switching is input. In such a case, the search unit 251 performs the frame image 1203 using HDTV data, the H. Assume that it is determined that a frame image 1212 based on H.264 data is a frame image showing the same video.

  In FIG. 12 (a), it is determined that the frame images represent the same video. The next frame image after the frame image 1212 based on the H.264 data is a frame image 1213. Therefore, the switching unit 216 performs the H.264 transmission after the frame image 1203 using HDTV data. It switches so that the frame image 1213 by H.264 data may be output. That is, the reproduced frame image 1221 is a frame image 1203 based on HDTV data, and the frame image 1222 reproduced immediately after the frame image 1221 is H.264. This is a frame image 1213 based on H.264 data.

  However, as described above, the frame image output immediately before switching is the frame image 1203 based on HDTV data, and when there is no switching as described above, the frame image to be output next to the frame image 1203 is the frame image. This is an image 1204. This frame image 1204 is an H.264 image. This is a frame image whose playback time is later than the frame image 1213 based on H.264 data. Therefore, when switching and outputting as described above, the frame image 1222 output next to the frame image 1221 is narrower by “t” than the interval between the frame images output so far. Therefore, it seems to the viewer that the part that has been switched is rapidly rotated. Furthermore, since the interval is narrowed, a load of rendering processing of the output device is applied.

  Therefore, when the difference between the reproduction times of the frame images to be switched is a predetermined value or less, the frame image to be switched is discarded, and the frame images at the reproduction times after the frame image are output, as described above, It is possible to eliminate a sense of incongruity in viewing such as temporarily rotating fast. Furthermore, since the interval does not become narrow, there is no load on rendering processing of the output device. The processing for this is S1105 to S1111 described above.

  In the case of the frame image of FIG. 12A described above, as shown in FIG. The frame image 1214 is a frame image 1214 next to the frame image 1213 based on H.264 data. As a result, it is possible to eliminate the uncomfortable feeling of viewing that is temporarily rotating as described above. Furthermore, since the interval does not become narrow, there is no load on rendering processing of the output device.

  Next, the motion vector of HDTV data in S1101 described above, From the inner product of the motion vector of H.264 data, the frame image of HDTV data which is the same image, An operation example for detecting a frame image of H.264 data will be described with reference to FIG.

  In FIG. 13, first, the correction unit 215 obtains a frame image that is a switching candidate (S1301). Here, the switching candidate frame image refers to, for example, a frame image based on HDTV data, a predetermined time after the information instructing switching is input from the reception state detection unit 201, and H.264. A frame image based on H.264 data.

  The search unit 251 selects the H.264 selected in S1301. The frame image based on H.264 data is enlarged to the same size as the frame image based on HDTV data (S1302). Next, the search unit 251 displays the frame image based on the HDTV data selected in S1301 and the H.264 image expanded in S1302. A difference image from the frame image based on the H.264 data is acquired (S1303). Since the processes in S1302 and S1303 are the same as those in the prior art, a specific operation example is omitted.

  The search unit 251 calculates a square error in luminance with the difference image acquired in the process of S1303 (S1304). This square error is, for example, a process of squaring the luminance difference of pixels at the same position between the switching target frame image and the difference image acquired in S1303 for all the pixels in the frame image. Is added.

  Next, the search unit 251 acquires the motion vector of the frame image based on the HDTV data acquired in S1301. At this time, the search unit 251 thins out and obtains the motion vector of the frame image based on the HDTV data (S1305). A detailed operation example will be described later.

  The search unit 251 acquires the H.264 acquired in S1301. A motion vector of the frame image based on H.264 data is acquired (S1306). The search unit 251 calculates the inner product of the motion vector acquired in S1305 and the motion vector acquired in S1306 (S1307).

  Here, the inner product can be calculated by the following Equation 1 or Equation 2.

なお、数２は、動きベクトルを座標で示した場合の式である。

Equation 2 is an expression when the motion vector is indicated by coordinates.

  The search unit 251 performs the processing of S1305 to S1307 with the frame image based on the HDTV data acquired in S1301 and the H.264 acquired in S1301. This is performed for each motion vector at the same position in a frame image based on H.264 data.

  Here, an example of an operation for acquiring a motion vector will be described in detail with reference to FIG. Note that the operation example described below is the same as that of the prior art.

  14, the search unit 251 includes HDTV data and H.264 data. For each of the H.264 data, setting information is extracted from the header of the sequence layer or the like (S1401). Next, the search unit 251 extracts setting information from a GOP (Group of Pictures) layer header or the like (S1402). The search unit 251 extracts setting information from the header and the like of the picture layer (S1403). The search unit 251 analyzes the slice layer header and the like to extract setting information (S1404). The search unit 251 extracts a macroblock (S1405), and acquires the XY coordinates of the motion vector included in each extracted macroblock (S1406). In order to obtain the XY coordinates of the motion vector, for example, a “Moving_vector (i, j)” function may be used. Here, “(i, j)” indicates a macroblock for obtaining a motion vector.

  In addition, an example of operation in which the motion vector is acquired by thinning out the motion vector in S1305 will be described with reference to FIG. In the operation example described below, the operation example itself for acquiring the motion vector is the same as the conventional technique described with reference to FIG.

  In FIG. 15, the search unit 251 includes the number of macroblocks “x1” on the horizontal axis of HDTV data, The number of macroblocks “x2” on the horizontal axis of the H.264 data is acquired and set as “X = x1 ÷ x2” (S1501). Further, the search unit 251 determines the number of macroblocks “y1” on the vertical axis of HDTV data, The number of macroblocks “y2” on the vertical axis of the H.264 data is acquired and set as “Y = y1 ÷ y2” (S1502). The search unit 251 acquires a motion vector from each macroblock indicated by the matrix “(i * X, j * Y)” of the HDTV data (S1503). Here, “i” indicates the horizontal axis position of the HDTV data macroblock, and “j” indicates the vertical axis position of the HDTV data macroblock. “X” is the value acquired in S1501 described above, and “Y” is the value acquired in S1502 described above. In order to obtain the XY coordinates of the motion vector, for example, a “Moving_vector (i * X, j * Y)” function may be used.

  Returning to FIG. 13, the search unit 251 determines whether the total sum of the inner products calculated in S1307 is larger than a predetermined threshold and whether the square error acquired in S1304 is smaller than the predetermined threshold (S1308). Therefore, the search unit 251 reads the threshold value 312 associated with the threshold type 311 “inner product threshold value” from the table 301 in the synchronization condition holding unit 211, and the total sum of the inner products calculated in S 1307 is obtained from the read threshold value 312. Judge whether it is large or not. Further, the search unit 251 reads the threshold 312 associated with the threshold type 311 “error threshold” from the table 301 in the synchronization condition holding unit 211, and the square error acquired in S 1304 is larger than the read threshold 312. It is determined whether or not.

  As a result of the determination in S1308, if the sum of the inner products calculated in S1307 is larger than the predetermined threshold and the square error acquired in S1304 is smaller than the predetermined threshold, the search unit 251 determines that the frame image selected in S1301 is the same It is determined that the frame image reflects the video.

  As a result of the determination in S1308, when the sum of the inner products is within the inner product threshold and the square error is within the difference threshold, the search unit 251 performs the process of S1301 again and selects another switching candidate frame image. To do. The other switching candidate frame images to be selected here are not particularly defined. For example, one of the previously selected frame images may be selected as a reference, and the other may be sequentially selected. May be selected as the frame image.

  Next, an operation example of acquiring a time stamp will be described with reference to FIG. The operation example described below is the same as that of the prior art.

  In FIG. 16, the time stamp acquisition unit 252 determines whether or not a TS (Transport Stream Packet) packet can be acquired from the input data (S1601).

  As a result of the determination in S1601, if the TS packet cannot be acquired, the time stamp acquisition unit 252 ends the process.

  As a result of the determination in S1601, if the TS packet can be acquired, the time stamp acquisition unit 252 analyzes the TS packet (S1602), and determines whether the PayloadStartUnitIndicator flag is ON, that is, “1” (S1603). .

  If the result of the determination in S1603 is that the PayloadStartUnitIndicator flag is ON, there is a PES (Packetized Elementarty Stream) packet header, and therefore the time stamp acquisition unit 252 acquires a PTS (Presentation Time Stamp) in the PES packet header. (S1604).

  As a result of the determination in S1603, when the PayloadStartUnitIndicator flag is not ON, the time stamp acquisition unit 252 performs the above-described processing from S1602 on other TS packets.

  Next, an operation example for performing correction will be described. This operation example is activated when, for example, the search unit 251 selects a frame image showing the same video by the above-described processing and then inputs activation instruction information together with information indicating the frame image. is there.

  First, an example of operation in which the color information acquisition unit 212 searches for a pixel area from which a luminance difference is acquired will be described with reference to FIGS.

  In FIG. 17, the color information acquisition unit 212 reads the luminance acquisition mode from the acquisition condition holding unit 213 (S1701). The color information acquisition unit 212 determines whether or not the read setting information indicates the full luminance acquisition mode (S1702).

  As a result of the determination in S1702, when the setting information indicates the full luminance acquisition mode, the color information acquisition unit 212 performs a full screen search described later.

  If the setting information does not indicate the full luminance acquisition mode as a result of the determination in S1702, the color information acquisition unit 212 determines whether or not the setting information read in S1701 indicates the central luminance acquisition mode (S1703). .

  As a result of the determination in S1703, when the setting information indicates the central luminance acquisition mode, the color information acquisition unit 212 performs a central screen search described later.

  If the setting information does not indicate the center luminance acquisition mode as a result of the determination in S1703, the color information acquisition unit 212 determines whether the setting information read in S1701 indicates the random luminance acquisition mode (S1704). .

  As a result of the determination in S1704, when the setting information indicates the random luminance acquisition mode, the color information acquisition unit 212 performs a random search described later.

  As a result of the determination in S1704, when the setting information does not indicate the random luminance acquisition mode, the color information acquisition unit 212 ends the process.

  Next, an operation example of full screen search will be described with reference to FIG.

  In FIG. 18, first, the color information acquisition unit 212 sets an initial value. Specifically, “Ysum1 = 0” and “Ysum2 = 0” are set (S1801). Next, the color information acquisition unit 212 selects an area of “6 * 6” pixels from the end of the frame image based on the HDTV data from among the frame images showing the same video instructed by the search unit 251, and the pixels in this area The average value of the luminance signal values is calculated, and this value is set to “Y” (S1802). Next, the color information acquisition unit 212 calculates “Ysum1 = Ysum1 + Y” (S1803). The color information acquisition unit 212 determines whether or not the above-described processing of S1802 and S1803 has been performed on all the pixels of the HDTV data frame image instructed by the search unit 251 (S1804).

  As a result of the determination in S1804, if not performed on all the pixels of the HDTV data frame image, the color information acquisition unit 212 selects a region of “6 * 6” pixels that has not been subjected to the above-described processing of S1802. The above processing is performed.

  As a result of the determination in S1804, when all the pixels of the frame image of the HDTV data have been processed, the color information acquisition unit 212 calculates “Ysum1 = Ysum1 ÷ (320 * 180)” (S1805).

  Next, the color information acquisition unit 212 selects H.H among the frame images showing the same video instructed by the search unit 251. One pixel is selected from the frame image based on the H.264 data, and the luminance signal acquired from the pixel is set to “y” (S1806). Next, the color information acquisition unit 212 calculates “Ysum2 = Ysum2 + y” (S1807). The color information acquisition unit 212 performs the processing of the above-described S1806 and S1807 on the H.264 instruction designated by the search unit 251. It is determined whether or not the processing has been performed on all the pixels of the H.264 data frame image (S1808).

  As a result of the determination in S1808, if not performed on all the pixels of the frame image of the HDTV data, the color information acquisition unit 212 performs the above-described processing on the pixels on which the above-described processing of S1806 has not been performed.

  As a result of the determination in S1809, if it is performed for all the pixels of the frame image of the HDTV data, the color information acquisition unit 212 calculates “Ysum2 = Ysum2 ÷ (320 * 180)” (S1809). Thereafter, the color difference acquisition unit 214 is activated, and the process proceeds to luminance difference acquisition processing.

  Next, with reference to FIG. 19, an operation example of the central screen search will be described.

  In FIG. 19, first, the color information acquisition unit 212 sets an initial value. Specifically, “Ysum1 = 0” and “Ysum2 = 0” are set (S1901). Next, the color information acquisition unit 212 selects a central region in the frame image based on HDTV data from among the frame images showing the same video instructed by the search unit 251 (S1902). The size and shape of the central area may be arbitrary, but here the central area is a rectangular area determined by the pixel position “(600, 360) − (1320, 720)”. To do.

  The color information acquisition unit 212 selects a region of “6 * 6” pixels from the end in the region selected in S1902, calculates an average value of luminance signal values of pixels in this region, and calculates this value. “Y” is set (S1903). Next, the color information acquisition unit 212 calculates “Ysum1 = Ysum1 + Y” (S1904). The color information acquisition unit 212 determines whether or not the above-described processing of S1903 and S1904 has been performed for all the pixels in the region selected in S1902 (S1905).

  As a result of the determination in S1905, if not performed for all the pixels selected in S1902, the color information acquisition unit 212 selects a region of “6 * 6” pixels that has not been subjected to the processing in S1903 described above, and Perform processing.

  As a result of the determination in S1905, when all the pixels selected in S1902 are performed, the color information acquisition unit 212 calculates “Ysum1 = Ysum1 ÷ (120 * 60)” (S1905).

  Next, the color information acquisition unit 212 selects H.H among the frame images showing the same video instructed by the search unit 251. A central area in the frame image based on H.264 data is selected (S1907). The size and shape of the central area may be arbitrary, but here the central area is a rectangular area determined by the pixel position “(100,60)-(220,120)”. To do.

  The color information acquisition unit 212 selects one pixel from the end of the region selected in S1907, and sets the luminance signal acquired from the pixel to “y” (S1908). Next, the color information acquisition unit 212 calculates “Ysum2 = Ysum2 + y” (S1909). The color information acquisition unit 212 determines whether or not the above-described processing of S1908 and S1909 has been performed on all the pixels in the region selected in S1907 (S1910).

  As a result of the determination in S1910, if not performed on all the pixels in the region selected in S1907, the color information acquisition unit 212 performs the above-described processing on the pixels not subjected to the above-described processing of S1908.

  As a result of the determination in S1910, if all pixels in the region selected in S1907 are performed, the color information acquisition unit 212 calculates “Ysum2 = Ysum2 ÷ (120 * 60)” (S1911). Thereafter, the color difference acquisition unit 214 is activated, and the process proceeds to luminance difference acquisition processing.

  Next, an example of random search operation will be described with reference to FIG.

  In FIG. 20, first, the color information acquisition unit 212 sets an initial value. Specifically, “Ysum1 = 0”, “Ysum2 = 0”, “n1 = 0”, “n2 = 0” are set (S2001). Next, the color information acquisition unit 212 randomly selects a pixel in the frame image based on the HDTV data among the frame images showing the same video instructed by the search unit 251 (S2002).

  The color information acquisition unit 212 selects an area of “6 * 6” pixels based on the pixel selected in S2002, calculates the average value of the luminance signal values of the pixels in this area, and sets this value as “Y”. (S2003). Next, the color information acquisition unit 212 calculates “Ysum1 = Ysum1 + Y” (S2004), and further calculates “n1 = n1 + 1” (S2005). The color information acquisition unit 212 determines whether or not “n1 = N” (S2006). This “N” is an arbitrary integer of “N> 0” and is predetermined, but may be changed according to information input via the input device 121 or the communication interface 110. .

  If the result of determination in S2006 is not “n1 = N”, the color information acquisition unit 212 performs the above-described processing after S2002 again.

  If the result of determination in S2006 is “n1 = N”, the color information acquisition unit 212 calculates “Ysum1 = Ysum1 ÷ N” (S2007).

  Next, the color information acquisition unit 212 selects H.H among the frame images showing the same video instructed by the search unit 251. The pixels in the frame image based on the H.264 data are randomly selected (S2008).

  The color information acquisition unit 212 sets the value of the luminance signal acquired from the pixel selected in S2008 to “y” (S2009). Next, the color information acquisition unit 212 calculates “Ysum2 = Ysum2 + y” (S2010), and further calculates “n2 = n2 + 1” (S2011). The color information acquisition unit 212 determines whether or not “n2 = N” (S2012).

  If the result of determination in S2012 is not “n2 = N”, the color information acquisition unit 212 performs the processing from S2008 described above.

  If the result of determination in S2012 is “n2 = N”, the color information acquisition unit 212 calculates “Ysum2 = Ysum2 ÷ N” (S2013). Thereafter, the color difference acquisition unit 214 is activated, and the process proceeds to luminance difference acquisition processing.

  Next, an operation example for acquiring the luminance difference will be described with reference to FIG.

  In FIG. 21, the color difference acquisition unit 214 calculates a luminance difference from the values “Ysum1” and “Ysum2” acquired by the color information acquisition unit 212 in the above-described processing. Specifically, the color difference acquisition unit 214 calculates the luminance difference using the expression “Δsum = Ysum1−Ysum2” (S2101). Thereafter, the correction unit 215 is activated to shift to color correction processing.

  Next, an operation example for correcting the color will be described with reference to FIG.

  In FIG. 22, the correction unit 215 selects one pixel of the frame image to be converted in the frame buffer 209 (S2201). The frame image to be converted is, for example, H.264 specified by the search unit 251. It is a frame image by H.264 data.

  Next, the correction unit 215 acquires the luminance of the pixel selected in S2201 and sets it as “y” (S2202). The correction unit 215 calculates “Y ′ = ((1 + Δsum) / Ysum2) * y” and performs color correction using the calculated “Y ′” value as the luminance of the pixel selected in S2201 (S2203). The process itself for changing the pixel to the calculated luminance is the same as that in the prior art. Specifically, for example, the parameter (in the table) is set so that the luminance of the pixel selected in S2201 becomes the calculated “Y ′”. (Not shown) or the like may be changed, or the correction unit 215 may change the value to “Y ′” obtained by calculating the color of the frame image drawn in the frame buffer 209.

  The correcting unit 215 determines whether or not there is an unselected pixel in the frame image to be converted in the frame buffer 209 (S2204).

  If there is an unselected image as a result of the determination in S2204, the correction unit 215 performs the process in S2201 again, and selects one of the unselected pixels.

  If there is no unselected pixel as a result of the determination in S2204, the correction unit 215 ends the color correction process. The correction unit 215 performs such processing in accordance with the H.D. The color correction is performed by performing on all the frame images after the frame image based on the H.264 data.

  On the other hand, as described above, the neighboring frame search unit 253 instructs the switching unit 216 to perform the rendering of the switching frame image after the rendering of the switching target frame image. In accordance with this instruction, the switching unit 216 switches from the frame image in the frame buffer 206 to the frame image from the frame buffer 209, or switches from the frame image in the frame buffer 209 to the frame image from the frame buffer 206, etc. A frame image is output from the output interface 109 (S2205).

  As a result of the above operation, the frame image in the frame buffer 209 has been subjected to color correction, so that it is possible to output an image that does not make the viewer feel uncomfortable.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within a scope not departing from the gist of the present invention are included. .

  For example, in the embodiment described above, H. However, the present invention is not limited to this, and a frame image based on HDTV data may be corrected.

  In the above-described embodiment, the color difference is described as acquiring the luminance and correcting the luminance, but is not limited thereto. For example, any of “R, G, B”, “Y, Cb, Cr”, brightness, saturation, etc. may be used, or a part or all of these may be combined.

  In the above-described embodiment, the user determines the luminance acquisition mode in advance. However, the present invention is not limited to this. For example, the setting may be changed according to the type of content to be output. In this case, for example, the acquisition condition holding unit 213 stores in advance a table in which the type of content such as “news”, “movie”, “other general”, and the acquisition pixel setting are associated with each other. . This acquired pixel setting is a setting of pixels from which color information is acquired by the color information acquisition unit 212 when outputting the type of content to be output. Specifically, for example, the table in the acquisition condition holding unit 213 includes an acquisition pixel setting “full screen” for the type “movie”, an acquisition pixel setting “center” for the type “news”, and a type “other general”. Is associated with the acquired pixel setting “random” or the like. The acquisition pixel setting “full screen” corresponds to the above-described full luminance acquisition mode. The acquisition pixel setting “center portion” corresponds to the above-described center portion luminance acquisition mode. The acquisition pixel setting “random” corresponds to the above-described random luminance acquisition mode. The apparatus 1 receives program information via the communication interface 110. The type of program included in the program information is input to the color information acquisition unit 212. The color information acquisition unit 212 reads the acquisition pixel setting corresponding to the type of the input program from the table of the acquisition condition holding unit 213, and acquires the color information of each pixel as described above with the read acquisition pixel setting. To do.

  H. H.264 data is used to correct the color of the frame image, and in the above-described determination in S1102, etc. When it is determined to switch from H.264 data to HDTV data, the color information acquisition unit 212 or the like may stop the above-described color correction processing by instructing the color difference acquisition unit 214 or the like. On the contrary, this is a case where the color of the frame image based on the HDTV data is corrected, and the H.V. When it is determined to switch to H.264 data, the color information acquisition unit 212 or the like may stop the above-described color correction processing by instructing the color difference acquisition unit 214 or the like.

It is a figure which shows the structural example of the receiver of one Embodiment of this invention. 3 is a diagram illustrating a configuration example of a processing unit that processes image data in the embodiment. FIG. In the same embodiment, it is a figure which shows an example of the conditions in a synchronous condition holding | maintenance part. In the same embodiment, it is a figure explaining all-luminance acquisition mode. In the same embodiment, it is a figure explaining the center part luminance acquisition mode. In the same embodiment, it is a figure explaining random luminance acquisition mode. FIG. 10 is a diagram illustrating an operation example for accepting setting of a luminance acquisition mode in the embodiment. In the same embodiment, it is a figure which shows the example of a screen. In the same embodiment, it is a figure which shows the example of a screen. FIG. 6 is a diagram for explaining an operation example for determining whether or not to switch output data in the embodiment. FIG. 10 is a diagram for explaining an operation example of selecting a frame image to be switched in the embodiment. In the same embodiment, it is a figure for demonstrating the space | interval of the reproduction time of the frame image switched. FIG. 10 is a diagram illustrating an operation example of selecting a frame image showing the same video in the same embodiment. FIG. 10 is a diagram for explaining an operation example for acquiring a motion vector in the embodiment. FIG. 10 is a diagram for explaining an operation example in which motion vectors are acquired by thinning out in the embodiment. FIG. 10 is a diagram illustrating an operation example of acquiring a time stamp in the embodiment. FIG. 6 is a diagram illustrating an example of an operation for acquiring luminance in the same embodiment. FIG. 6 is a diagram illustrating an example of an operation for acquiring luminance in the same embodiment. FIG. 6 is a diagram illustrating an example of an operation for acquiring luminance in the same embodiment. FIG. 6 is a diagram illustrating an example of an operation for acquiring luminance in the same embodiment. FIG. 6 is a diagram for explaining an operation example for acquiring a luminance difference in the embodiment. FIG. 6 is a diagram illustrating an example of an operation to be corrected in the same embodiment.

Explanation of symbols

1: receiving device, 101: antenna, 102: tuner, 103: OFDM demodulation unit, 104: processing unit, 105: RAM, 106: ROM, 107: storage device, 108: input interface, 109: output interface, 110: communication Interface: 120: Bus 121: Input device 201: Reception state detection unit 202: Reception state detection condition holding unit 203: DEMUX 204: Decoder 205: Drawing processing unit 206: Frame buffer 207: Decoder 208: Drawing processing unit, 209: Frame buffer, 210: Synchronization unit, 251: Search unit, 252: Time stamp acquisition unit, 253: Neighboring frame search unit, 211: Synchronization condition holding unit, 212: Color information acquisition unit, 213 : Acquisition condition holding unit, 214: color difference acquisition unit, 215: correction unit, 216: off Shank, 217: setting receiver

Claims (6)

A receiving device that receives image data of the same video in different modes and outputs image data to output means from image data of the first mode to image data of the second mode,
Synchronization detection means for determining whether or not the frame image of the image data of the first method and the frame image of the image data of the second method show the same video;
A difference for obtaining a color difference between the color of the frame image of the image data of the first method determined to show the same video and the color of the frame image of the image data of the second method by the determination. Acquisition means;
Correction means for correcting the color of the frame image of the image data of the second method according to the acquired color difference;
Switching means for outputting the corrected second-system image data to the output means;
A receiving apparatus comprising: The receiving device according to claim 1,
The synchronization detection means determines whether a sum of inner products of a motion vector of the frame image of the image data of the first method and a motion vector of the frame image of the image data of the second method is within a predetermined value. Kaniyori, wherein the frame image of the image data of the first type, receiving said second type image data of the frame image is characterized by whether determine Teisu Rukoto that reflects the same video device. The receiving device according to claim 1 or 2,
The difference acquisition means includes all the pixels of the color of the frame image of the image data of the first method and the frame image of the image data of the second method, the pixel at the center of each frame image, and each A receiving apparatus that acquires a color difference of any one of arbitrary pixels of a frame image. The receiving device according to any one of claims 1 to 3,
Reproduction time acquisition means for acquiring the reproduction time of the frame image of the image data of the first method and the reproduction time of the frame image of the image data of the second method;
When the difference between the acquired reproduction times is greater than a predetermined value, the frame image of the second image data from which the reproduction time is acquired is next to the frame image of the first method image data from which the reproduction time has been acquired. And a frame search means for outputting an instruction to be output to the output means to the switching means. A color correction method by a receiving device that receives image data of different methods of the same video and outputs image data output to the output means from image data of the first method to image data of the second method,
A synchronization detection step of determining whether or not the frame image of the image data of the first method and the frame image of the image data of the second method show the same video;
A difference for obtaining a color difference between the color of the frame image of the image data of the first method determined to show the same video and the color of the frame image of the image data of the second method by the determination. An acquisition step;
A correction step of correcting the color of the frame image of the image data of the second method according to the acquired color difference;
A switching step of outputting the corrected image data of the second method to the output means;
A color correction method comprising: A color correction program for causing a receiving device to receive image data of the same video in different systems and output image data to output means from image data of the first system to image data of the second system. ,
A synchronization detection step of determining whether or not the frame image of the image data of the first method and the frame image of the image data of the second method show the same video;
A difference for obtaining a color difference between the color of the frame image of the image data of the first method determined to show the same video and the color of the frame image of the image data of the second method by the determination. An acquisition step;
A correction step of correcting the color of the frame image of the image data of the second method according to the acquired color difference;
A switching step of outputting the corrected image data of the second method to the output means;
A color correction program characterized by causing

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