JP3544100B2 - Digital broadcast receiver - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a digital broadcast receiver.
[0002]
[Prior art]
FIG. 18 shows a conventional configuration of a digital receiver. The conventional digital broadcast receiver shown in FIG. 18 is a device for receiving digital broadcast conforming to DVB (Digital Video Broadcasting). Here, as one configuration of the digital broadcast receiver, a DVB-compliant digital broadcast receiver will be described as an example.
[0003]
Normally, in digital broadcasting, a single repeater can transmit a plurality of services. Each service is composed of one or more compressed video signal streams or audio signal streams.
[0004]
Therefore, a signal transmitted from one repeater includes a plurality of streams, and these streams are packetized and multiplexed.
[0005]
In digital broadcasting conforming to DVB, a video signal and an audio signal are compressed by an MPEG (Moving Picture Coding Expert Group) method, and the compressed signal is multiplexed by a method specified by MPEG.
[0006]
The multiplexed signal is called a transport stream. In the transport stream, service information for selecting a service called SI (Service Information) or transmitting additional information of the service is multiplexed.
[0007]
The receiver can select a service based on service identification information for selecting a service described in the service information.
[0008]
The service identification information includes information for specifying a repeater and information for specifying a stream. The service information includes genre identification information describing the genre of each service. The genre described in the genre identification information may be described hierarchically.
[0009]
In digital broadcasting, since many services are broadcast, a device is devised to make it easier for a user to select a service. One of them is a method of selecting a service from a multi-screen.
[0010]
The transmitting side collects a plurality of services to be selected by the user for the purpose of promotion or the like, encodes them as a multi-screen, and transmits the same as a normal service. On the receiving side, the multi-screen is displayed on the monitor, and in the multi-screen, the user can directly select a service by selecting one child screen (cell) by moving a cursor or the like.
[0011]
The service information describes the association between each cell and the service identification information, and the receiver can directly select a service from the selected cell based on the information.
[0012]
The operation of the DVB-compliant digital broadcast receiver will be described below with reference to FIG. In the following description, a method of selecting a service from the multi-screen will also be described.
[0013]
A modulated transport stream is input from a terminal 101 and supplied to a demodulation circuit 110. The demodulation circuit 110 designates a repeater of the service selected by the user based on the service identification information, receives a transport stream of the designated repeater, and performs demodulation. The demodulated signal is input to an error correction circuit 111, subjected to error correction, and input to a transport processing circuit 112.
[0014]
The transport processing circuit 112 separates the transport stream by exchanging with the host CPU 116, and extracts service information from the transport stream.
[0015]
The host CPU 116 processes the service number selected by the user and the service information, and extracts the service identification information of the video signal of the service selected by the user. Based on the service identification information of the video signal of the service selected by the user, the transport processing circuit 112 extracts the desired video signal and supplies it to the MPEG decoder 113.
[0016]
The user transmits a service identification number for identifying the selected service to the host CPU 116 through the light receiving unit 117 using a remote controller or the like or through the external input terminal 102 of the receiver.
[0017]
The MPEG decoder 113 decodes the encoded video signal to generate a luminance signal and a color difference signal digital signal, and outputs the digital signal to the display processing circuit 114. In the display processing circuit 114, predetermined processing is appropriately performed on the decoded video signal, and the decoded video signal is displayed on the monitor 115.
[0018]
A method of selecting a service from the multi-screen created by the transmitting side using the conventional receiver shown in FIG. 18 will be described.
[0019]
The user selects a multi-screen service through the light receiving unit 117 with a remote controller or the like, or through the external input terminal 102 of the receiver, and displays the multi-screen on the monitor 115.
[0020]
The user selects a cell by moving the cursor from the multi-screen displayed on the monitor 115 or the like. Each cell is associated with service identification information, and this association is described in the service information.
[0021]
The user informs the host CPU 116 of the selected cell through the light receiving unit 117 using a remote controller or the like or through the external input terminal 102 of the receiver.
[0022]
The host CPU 116 extracts service information from the transport processing circuit 112 and processes the service information, thereby extracting information that associates the cell with the service identification information.
[0023]
Thereafter, the host CPU 116 can determine the service stream to be separated from the transport stream based on the information in which the cell and the service identification information are associated with each other.
[0024]
After that, the stream of one service is separated by the transport processing circuit 112, decoded by the MPEG decoder 113, and displayed on the monitor 115 through the display processing circuit 114. By the above means, service selection can be performed by selecting a cell.
[0025]
If a means for selecting a service from a multi-screen using this conventional receiver is used, the multi-screen is created and transmitted on the transmission side, and therefore can only be selected from services uniquely determined on the transmission side. . In addition, the number of services that can be displayed on the multi-screen has a limit in terms of resolution. Therefore, the range of service selection is limited.
[0026]
[Problems to be solved by the invention]
In a conventional digital broadcast, a transmitting side uniquely determines a service to be displayed on a multi-screen. Therefore, the service that the user wants to select is not always displayed on the multi-screen, and there is a limit to the services that can be selected.
[0027]
In addition, the number of services that can be displayed at a time on the multi-screen has a limit in terms of resolution, and the only way to increase the number of services that can be selected from the multi-screen is to increase the number of services of the multi-screen to be transmitted. However, increasing the number of multi-screen services puts pressure on the number of normal services.
[0028]
Therefore, an object of the present invention is to provide a digital broadcast receiver configured so that a user can easily select each service displayed as a multi-screen child screen regardless of a transmission state.
[0029]
[Means for Solving the Problems]
(First configuration example)
In a digital broadcast receiver for receiving a digital broadcast in which genre information describing a genre of each service is multiplexed and transmitted in a stream in which a plurality of services are multiplexed,
Extracting means for extracting, from the stream, a video signal of a service classified into the same genre information as the genre selected by the user while switching at a predetermined timing;
Means for down-sampling the extracted video signal of the service,
Frame memory means for holding the down-sampled video signal of the service at the predetermined timing, changing the area for each service,
Display means for displaying the video signal of the service held in the frame memory means as a multi-screen.
[0030]
(Second configuration example)
In a digital broadcast receiver for receiving a digital broadcast in which genre information describing a genre of each service is hierarchically described in a stream in which a plurality of services are multiplexed, the genre is the same as the genre selected by the user from the stream. Extracting means for extracting a video signal of each lower-layer service classified as genre information while switching at predetermined timing; down-sampling means for down-sampling the extracted video signal of the service; and down-sampling. Frame memory means for holding, at the predetermined timing, the video signal of the service provided by changing the area for each service, and a service of the lower hierarchy having the same genre held in the frame memory means. The video Display means for performing multi-display so as to be adjacent to each other.
[0031]
(Third configuration example)
In a digital broadcast receiver for receiving a digital broadcast transmitting a stream multiplexing a plurality of services,
Selecting means for outputting, when the user selects a service group, group identification information corresponding to the group,
Memory means for holding the group identification information in a first area, and holding service identification information corresponding to the group identification information from the selection means in the second area from the first area;
Extracting means for extracting, from the stream obtained by multiplexing the plurality of services, a video signal of a service corresponding to the service identification information held in the second area of the memory means while switching at a predetermined timing;
Down-sampling means for down-sampling the extracted video signal of the service,
Frame memory means for holding the down-sampled video signal of the service at the predetermined timing, changing the area for each service,
Display means for displaying the video signal of the service held in the frame memory means as a multi-screen.
[0032]
(Fourth configuration example)
In a digital broadcast receiver for receiving a digital broadcast in which genre information describing a genre of each service is multiplexed and transmitted in a stream in which a plurality of services are multiplexed,
First memory means for holding service identification information for identifying a service selected by the user in the past;
Second memory means for inputting and holding the service identification information from the first memory means;
Extracting means for extracting, from the stream obtained by multiplexing the plurality of services, a video signal of a service corresponding to the service identification information held in the second memory means while switching at a predetermined timing;
Down-sampling means for down-sampling the extracted video signal of the service,
Frame memory means for holding the down-sampled video signal of the service at the predetermined timing, changing the area for each service,
Display means for displaying the video signal of the service held in the frame memory means as a multi-screen.
[0033]
BEST MODE FOR CARRYING OUT THE INVENTION
(First Embodiment)
FIG. 1 shows the configuration of a digital broadcast receiver according to a first embodiment of the present invention. The same components as those of the conventional digital broadcast receiver are denoted by the same reference numerals.
[0034]
A modulated transport stream is input from a terminal 101, demodulated by a demodulation circuit 110, subjected to error correction by an error correction circuit 111, and input to a transport processing circuit 112.
[0035]
The host CPU 116 processes a signal input by the user through the light receiving unit 117 using a remote controller or the like or through the external input terminal 102 of the receiver, and performs demodulation circuit 110, error correction circuit 111, transport processing circuit 112, MPEG decoder 113 , The downsampling processing circuit 119, the frame memory 120, the selection circuit 121, and the memory 122.
[0036]
The transport processing circuit 112 performs a process of separating the video signal of the service selected by the user through the light receiving unit 117 using a remote controller or the like through the external input terminal 102 of the receiver.
[0037]
The video signal extracted by the transport processing circuit 112 is input to the MPEG decoder 113 and decoded. The decoded video signal is input to the selection circuit 121 and the downsampling processing circuit 119.
[0038]
The video signal input to the downsampling processing circuit 119 is subjected to downsampling processing. The reduction rate at the time of downsampling is controlled by the host CPU 116. The down-sampled signal is held in a predetermined area of the frame memory 120. The retained area is controlled by the host CPU 116.
[0039]
The video signal held in the frame memory 120 is output to the selection circuit 121. The selection circuit 121 selects a signal from the MPEG decoder 113 and a signal from the frame memory 120 according to a control signal from the host CPU 116 and outputs one of the signals to the display processing circuit 114.
[0040]
In the display processing circuit 114, predetermined processing is appropriately performed on the decoded video signal, and is displayed on the monitor 115. The predetermined processes include a filtering process and an NTSC encoding process (when the monitor 115 is an NTSC monitor).
[0041]
The memory 122 is used for holding genre identification information, genre information selected by a user, information relating a multi-screen cell to service identification information, and multi-screen identification information for identifying a plurality of multi-screens.
[0042]
With the configuration shown in FIG. 1 and the host CPU 116 performing the processing according to the processing procedure shown in FIG. 2, a multi-screen can be displayed for each genre. The service can be selected from the displayed multi-screen.
[0043]
Hereinafter, the operation when a multi-screen having 16 cells is displayed as shown in FIG. 3 and a program is selected from the multi-screen will be described. Note that the number of cells constituting the multi-screen can be arbitrarily set.
[0044]
FIG. 4 shows the contents of the data held in the memory 122. In FIG. 4, the memory 122 is divided into three areas. Area A is a part for storing genre information selected by the user. Area B is a part for storing genre identification information for identifying the genre of each service. Area C is a part for storing service identification information corresponding to a multi-screen cell and multi-screen identification information for identifying a plurality of multi-screens.
[0045]
Hereinafter, the processing procedure will be described with reference to FIG.
[0046]
The user shifts to the multi-screen display mode through the light receiving unit 117 with a remote controller or the like through the external input terminal 102 of the receiver, and selects a genre.
[0047]
If the genre is not selected, the host CPU 116 sets default genre information.
[0048]
The genre selected by the user is stored as genre information in area A of memory 122 under the control of host CPU 116. The state at this time is as shown in FIG. In FIG. 4A, genre information J1 of the genre selected by the user is stored in area A.
[0049]
The host CPU 116 controls the transport processing circuit 112, extracts genre identification information from each service information, and stores the genre identification information in the area B of the memory 122. At this time, part of all genre identification information stored in the area B is as shown in FIG.
[0050]
As shown in FIG. 4B, the genre information corresponding to the service identification information SV0 is J1, and the genre information corresponding to the service identification information SV1 is J4.
[0051]
That is, each genre identification information has genre information added to the service identification information, so that the genre of each service can be identified.
[0052]
Thereafter, the host CPU 116 determines whether or not the genre identification information held in the area B of the memory 122 includes service identification information of the genre selected by the user (step 201).
[0053]
If the result of the determination in step 201 is that there is no service identification information, the host CPU 116 cannot perform multi-screen display, and displays that fact on the monitor 115.
[0054]
If the result of the determination in step 201 is that there is service identification information, the host CPU 116 stores, in the genre identification information, service identification information that is of the genre selected by the user and has not been transferred from area B to area C of memory 122. It is determined whether there is (Step 202). If the result of the determination is negative, host CPU 116 performs process 208.
[0055]
If the result of the determination in step 202 is that there is service identification information, the host CPU 116 detects the number of service identification information held in the memory 122 and determines whether the number is greater than the number of multi-screen cells. (Step 203). Here, since the number of cells of the multi-screen is 16 as shown in FIG. 3, it is determined whether or not the number of service identification information is larger than 16.
[0056]
If the result of the determination is that there is not much, the host CPU 116 secures an area for storing the down-sampled video signal in the frame memory 120 and specifies that area (step 204). For example, the area 1 in the multi-screen shown in FIG. 3 is secured on the frame memory 120 and designated.
[0057]
Next, the host CPU 116 refers to the genre information (area A) of the genre selected by the user and the genre identification information (area B) stored in the memory 122, and determines the service identification information matching the genre selected by the user. Is acquired (process 205).
[0058]
The acquired service identification information is held in the area C of the memory 122 together with the information of the area secured in the process 204 by the host CPU 116 (process 206).
[0059]
At this time, the host CPU 116 adds multi-screen identification information for identifying a multi-screen as multi-screen identification information.
[0060]
For example, in FIG. 4C, it is assumed that the service identification information SV0 whose genre is J1 is acquired, and the area 1 on the multi-screen shown in FIG. The service identification information SV0 is displayed in the area 1 on the multi-screen in FIG. 3, so that the SV0 is associated with the area 1. Since the current multi-screen is the first multi-screen, the multi-screen identification information CH1 is added to the multi-screen, and the multi-screen identification information is stored in area C of the memory 122.
[0061]
Thereafter, the process enters a waiting state until a predetermined time elapses (process 207).
[0062]
During this time, the transport processing circuit 112 extracts a service video signal based on the obtained service identification information in process 205, and the extracted video signal is decoded by the MPEG decoder 113 and down-sampled. The processing circuit 119 sets a reduction ratio according to the number of cells, performs downsampling under the set reduction ratio, and writes the data in a selected area of the frame memory 120.
[0063]
Here, it is assumed that the screen is divided and displayed on the monitor in the state shown in FIG. Assuming that the resolution of the transmitted video signal is 720 samples in the horizontal direction and 480 lines in the vertical direction, this is reduced to 1/4 in both the horizontal and vertical directions, and downsampled to 180 samples in the horizontal direction and 120 lines in the vertical direction.
[0064]
The downsampling reduction rate is calculated from the number of cells displayed by the host CPU 116, and controls the downsampling processing circuit 119.
[0065]
In the process 207, when the process is in the waiting state, the host CPU 116 returns to the process 202 after a predetermined time has elapsed, and repeats the same process.
[0066]
When returning to the process 202 and repeating the same process, the host CPU 116 selects an area different from the area once selected when the area of the frame memory 120 is specified in the step 204.
[0067]
The host CPU 116 also obtains the service identification information once obtained and another service identification information in the process 205. This is performed by the host CPU 116 viewing the information written in the area C of the memory 122 in FIG.
[0068]
In this way, the service identification information of the genre selected by the user is sequentially acquired while changing the area to be stored in the frame memory 120, the decoding process is performed, and the video signal is stored in the frame memory 120. This repetitive processing is performed until an area of the frame memory 120 is secured by the number of cells of the multi-screen or all the service identification information is acquired.
[0069]
The host CPU 116 performs the process 208 if the area of the frame memory 120 is secured by the number of cells of the multi-screen or if all the service identification information is obtained.
[0070]
Also, the host CPU 116 reserves the area of the frame memory 120 by the number of cells of the multi-screen, and if there is still service identification information that can be selected, the host CPU 116 switches to another multi-screen and further sets the multi-screen as a multi-screen. The fact that another service can be displayed can be displayed on the monitor 115 to notify the user.
[0071]
The host CPU 116 stores the service identification information and the area information in the memory 122 when the area of the frame memory 120 is secured by the number of cells of the multi-screen or when all the service identification information is obtained. It is taken out of area C (process 208).
[0072]
Thereafter, the host CPU 116 specifies an area of the frame memory 120 corresponding to the area corresponding to the service identification information, and updates the area with the decoded video signal (processing 209).
[0073]
The next process 210 is the same as the process 207.
[0074]
The host CPU 116 returns to step 208 after a predetermined period of time has passed while waiting in step 210, and repeats the same processing.
[0075]
Upon entering the multi-screen program selection mode, the host CPU 116 repeats the processing from the processing 201 to the processing 210, and switches to another multi-screen by a user's remote control operation or the like when the multi-screen is displayed on the monitor 115. There are cases.
[0076]
At that time, the frame memory 120 is cleared, and the processing of the host CPU 116 is forcibly started from the processing 201 in FIG. 2, and thereafter the same processing is repeated. At this time, as shown in FIG. 4D, the multi-screen identification information stored in the area C changes.
[0077]
In addition, the user enters the multi-screen program selection mode, repeats the above-described processing 201 to 210, and when the multi-screen is displayed on the monitor 115, the user selects a service by moving the cursor from the multi-screen. In this case, the host CPU 116 refers to the service identification information and the multi-screen identification information corresponding to the multi-screen cell stored in the area C of the memory 122, and selects the selected cell and the multi-screen of the currently displayed multi-screen. The service identification information is extracted based on the screen identification information. In synchronization with this, the output of the selection circuit 121 is controlled so as to select the signal from the MPEG decoder 113.
[0078]
The transport processing circuit 112 extracts a video signal of the service corresponding to the service identification information based on the service identification information, decodes the video signal with the MPEG decoder 113, passes through the selection circuit 121 and the display processing circuit 114, and Displayed at 115.
[0079]
The video signal held in the frame memory 120 is always displayed on the monitor 115. Further, the host CPU 116 reads the genre information of the area A in the memory 122, and displays the genre name on the monitor 115. Further, instead of dividing the memory 122 into areas A, B, and C, the memory 122 may be configured with three memories.
[0080]
FIG. 5 shows an operation procedure in the multi-screen program selection mode from buttons or the like provided outside the remote controller and the receiver. Hereinafter, an outline of service selection from the multi-screen will be described with reference to FIG.
[0081]
The user first switches to the multi-screen program selection mode to select a service from the multi-screen (operation 501).
[0082]
Thereafter, a multi-screen as shown in FIG. 6A is displayed on the monitor 115.
[0083]
Thereafter, by selecting a genre (operation 503), only programs that match the genre are displayed on the multi-screen.
[0084]
The genre can be selected by directly selecting a key by pressing the key with a remote controller or the like, or displaying the genre as an OSD (On Screen Display) on a monitor as shown in FIG. There is a method of selecting by moving the cursor. Alternatively, as shown in FIG. 6D, the genre display may be displayed separately from the cell at the top of the screen. In this case, the vertical length of all cells is shorter than that in FIG.
[0085]
Further, as shown in FIG. 6C, the multi-screen can be switched to another multi-screen by operating a key of a remote controller (operation 502). To exit the program selection mode from the multi-screen, select one cell (program) from the multi-screen and select a service (operation 504), or press a key to end the multi-screen program selection mode (operation 505). And so on.
[0086]
As described above, if a multi-screen is created using the frame memory 120 for each specified genre and a service is selected from the multi-screen, it is necessary to create and transmit the multi-screen on the transmission side. And the service can be used effectively. In addition, since a multi-screen can be created for each genre selected by the user, the multi-screen is easy to see for the user, and service selection becomes easy.
[0087]
(Second embodiment)
The second embodiment of the digital broadcast receiver according to the present invention relates to a method of displaying a multi-screen when genre information in genre identification information described in service information is transmitted as hierarchical information. It is.
[0088]
The genre is, for example, as shown in FIG. 7, a rough classification J1, J2, J3... And a small classification J1-1, J1-2, J1-3 obtained by further dividing the large classification J1. .. Are described hierarchically. J2, J3... Are further classified. Genres may be hierarchized in any number of levels.
[0089]
At this time, a method of displaying a multi-screen when the user selects the genre information J1 that is a genre of the large classification will be described. The processing procedure in the host CPU 116 is the same as in FIG. The configuration is the same as that of the first embodiment.
[0090]
Here, the contents of the memory 122 are shown in FIG. In FIG. 8, area A is a part for storing genre information selected by the user. Area B is a part for storing genre identification information for identifying the genre of each service. Area C is a part for storing service identification information corresponding to a multi-screen cell and multi-screen identification information for identifying a plurality of multi-screens.
[0091]
In FIG. 8A, genre information J1 selected by the user is stored in area A. Also, in FIG. 8B, area B holds genre identification information. Here, the genre identification information stored in the area B is hierarchical.
[0092]
Thereafter, the host CPU 116 repeats the process 202 to the process 205 to sequentially acquire the service identification information of the genre selected by the user while changing the area to be stored in the frame memory 120. At this time, the area of the frame memory 120 is secured in order from the one with the same small classification, and when the multi-screen is displayed on the monitor 115, the service with the same small classification is arranged in the adjacent cell.
[0093]
The contents of the memory 122 at this time are shown in FIG. FIG. 9 shows a display state on the monitor 115. In FIG. 8 (3) and FIG. 9, for example, when J1 is the genre information of sports, since there are several types of programs in J1, even if the service identification numbers are different, the JIs are duplicated. Is different.
[0094]
As in the first embodiment, the video signal stored in the frame memory 120 is always displayed on the monitor 115. Further, the host CPU 116 reads the genre information of the area A in the memory 122, and displays the genre name on the monitor 115. Further, instead of dividing the memory 122 into areas A, B, and C, the memory 122 may be configured with three memories.
[0095]
The operation procedure in the multi-screen program selection mode from a button or the like provided outside the remote controller and the receiver is performed according to FIGS. 5 and 6 as in the first embodiment.
[0096]
As described above, a multi-screen is created using the frame memory 120 for each specified genre, and services are arranged such that cells are adjacent to each other in more detailed classification in the multi-screen. Selection becomes easy.
[0097]
(Third embodiment)
In the third embodiment of the digital broadcast receiver according to the present invention, when the service displayed in each cell of the multi-screen is a moving image, the first and second embodiments are used to smoothly display the movement. In addition to the above operation, the information of the repeater is used when acquiring the service identification information of the genre selected by the user.
[0098]
The processing procedure in the host CPU 116 is the same as in FIG. The configuration is the same as in the first and second embodiments.
[0099]
The host CPU 116 repeats the process 202 to the process 205 to sequentially acquire the service identification information of the genre selected by the user while changing the area to be stored in the frame memory 120.
[0100]
At this time, the host CPU 116 looks at the information related to the identification of the repeater in the service identification information, and acquires the information from the service identification information of the same repeater.
[0101]
If the service is switched and the multi-screen display is performed without changing the repeater, the service can be displayed in one cell and the switching time until the service is displayed in the next cell can be reduced.
[0102]
As a result, the time required to display the service in all cells of the multi-screen can be shortened, and the display is switched from cell to cell quickly. The effect of smooth display is obtained. .
[0103]
By taking the above measures, the frequency of switching the repeater can be suppressed, and the above-described effect can be obtained.
[0104]
(Fourth embodiment)
In the fourth embodiment of the digital broadcast receiver according to the present invention, services that a user wants to display on a multi-screen are stored in a memory, and when the services are stored in the memory, the services are grouped and stored. By making a selection, services belonging to the selected group are displayed as a multi-screen.
[0105]
FIG. 10 shows the configuration of the fourth embodiment. The components other than the memory 118 and the memory 123 are the same as those in the first embodiment, are given the same numbers, and detailed descriptions are omitted.
[0106]
The user can register a service in the memory 118. At this time, service identification information and group identification information are registered. The group identification information is group information that can be defined by the user, and can classify some services into one group.
[0107]
The memory 123 holds the association between the service identification information, the information on the multi-screen area, and the multi-screen identification information.
[0108]
As shown in FIG. 11A, the memory 118 holds the association between the service identification information registered by the user and the group identification information. 11 (2), 11 (3), and 11 (4) show examples of the contents held in the memory 123.
[0109]
FIG. 12 shows a processing procedure of the host CPU 116 in the multi-screen program selection mode. Hereinafter, the processing procedure will be described with reference to FIG.
[0110]
The user shifts to the multi-screen display mode through the light receiving unit 117 with a remote controller or the like or through the external input terminal 102 of the receiver, and selects a group.
[0111]
If a group is not selected, the host CPU 116 sets default group identification information.
[0112]
The group selected by the user is held as group identification information in the memory 123 through the host CPU 116. The state at this time is as shown in FIG. In FIG. 11B, the group identification information G1 of the group selected by the user is stored.
[0113]
Thereafter, the host CPU 116 determines whether or not the service identification information classified into the group selected by the user is stored in the memory 118 (step 801).
[0114]
As a result of the determination, if the information is not stored, the multi-screen display cannot be performed, and the fact is displayed on the monitor 115.
[0115]
If the host CPU 116 determines that the service identification information stored in the memory 118 has not been transferred to the memory 123 among the service identification information classified into the group identification information of the group selected by the user. It is checked whether there is information (process 802). If not, host CPU 116 performs process 808.
[0116]
If the result of the determination is that there is service identification information that has not been transferred to the memory 123, the host CPU 116 detects the number of service identification information held in the memory 123, and the number is greater than the number of cells of the multi-screen. It is determined whether or not it is (process 803).
[0117]
If the result of determination is that there is not much, the host CPU 116 secures an area for storing the down-sampled video signal in the frame memory 120 and specifies that area (step 804). For example, the area 1 in the multi-screen shown in FIG. 3 is secured on the frame memory 120 and designated.
[0118]
Next, the host CPU 116 acquires one piece of service identification information that has not been transferred from the memory 118 to the memory 123 (step 805).
[0119]
The host CPU 116 stores the acquired service identification information in the memory 123 together with the information of the area specified in the process 804 (process 806). At this time, the host CPU 116 adds information for identifying a multi-screen as multi-screen identification information.
[0120]
Thereafter, the host CPU 116 enters a wait state until a predetermined time has elapsed (process 807).
[0121]
During this time, the transport processing circuit 112 extracts a video signal based on the service identification information acquired in the processing 805, and the extracted video signal is decoded by the MPEG decoder 113, and the down-sampling processing circuit 119 , The data is down-sampled and written into a selected area of the frame memory 120.
[0122]
When a predetermined period of time has elapsed during the waiting state in step 807, the host CPU 116 returns to step 802 and repeats the same processing.
[0123]
As a result, the services of the service identification information classified into the group selected by the user are sequentially decoded and sequentially stored in a predetermined area of the frame memory 120.
[0124]
This repetitive processing is performed by reserving the area of the frame memory 120 by the number of cells of the multi-screen or by storing all the service identification information stored in the memory 118 into the group selected by the user in the memory 123. It is performed until it is transferred.
[0125]
The host CPU 116 reserves the area of the frame memory 120 by the number of cells of the multi-screen, or stores in the memory 123 all the service identification information stored in the memory 118 which is classified into the group selected by the user. If it has been transferred, processing 808 is performed.
[0126]
In addition, the area of the frame memory 120 is secured by the number of cells of the multi-screen, and is stored in the memory 118 and is still transferred to the memory 123 among the service identification information classified into the group selected by the user. If there is service identification information that has not been provided, switching to another multi-screen will display on the monitor 115 that another service can be displayed as a multi-screen, informing the user.
[0127]
The host CPU 116 secures the area of the frame memory 120 by the number of cells of the multi-screen, or transfers all the service identification information, which is stored in the memory 118 and classified into the group selected by the user, to the memory 123. After that, the service identification information and the information of the area of the frame memory 120 are obtained from the memory 123 (process 808).
[0128]
The state of the memory 123 at this time is shown in FIG. As shown in FIG. 11 (3), at this point, since the processing 802 to the processing 807 are repeated, the service identification information of the group selected by the user stored in the memory 118 and the multi-screen area Is associated with the data of the multi-screen identification information.
[0129]
The host CPU 116 designates the area of the frame memory 120 with the acquired information of the area, and updates the designated area with the decoded video signal (process 809).
[0130]
The processing 810 by the host CPU 116 is the same as the processing 807 by the host CPU 116.
[0131]
The host CPU 116 returns to the process 808 after a predetermined time has passed in the process 810, and thereafter repeats the processes 808 to 810.
[0132]
When the multi-screen program selection mode is entered and the above-described processes 801 to 810 are repeated to display the multi-screen on the monitor 115, the user may switch to another multi-screen by operating a remote controller or the like.
[0133]
At that time, the frame memory 120 is cleared, and the processing of the host CPU 116 is forcibly started from the processing 801 in FIG. 12, and thereafter, the same processing is repeated. At this time, as shown in FIG. 11D, the multi-screen identification information of the multi-screen stored in the memory 123 changes from CH1 to CH2.
[0134]
In addition, the user enters the multi-screen program selection mode and repeats the above-mentioned processing 801 to processing 810 to select a program by moving the cursor from the multi-screen when the multi-screen is displayed on the monitor 115. In this case, the host CPU 116 refers to the service identification information and the multi-screen identification information corresponding to the multi-screen cell stored in the memory 123, and based on the selected cell and the currently displayed multi-screen identification information. Then, the service identification information is extracted from the memory 123.
[0135]
In synchronization with this, the output of the selection circuit 121 is controlled so as to select the signal from the MPEG decoder 113. The transport processing circuit 112 extracts a video signal of a service corresponding to the service identification information based on the service identification information. The extracted video signal is decoded by the MPEG decoder 113, and is output to the selection circuit 121. The information is displayed on the monitor 115 via the processing circuit 114. In this way, the program selected from the multi-screen is displayed on the monitor 115.
[0136]
The video signal held in the frame memory 120 is always displayed on the monitor 115. The host CPU 116 reads the group identification information from the memory 123 and displays the group name on the monitor 115. Further, a plurality of memories may be used in place of the memory 123, and information stored in the memory 123 may be separately stored. Conversely, the memories 118 and 123 may be constituted by one memory.
[0137]
FIG. 13 shows an operation procedure in the multi-screen program selection mode from buttons and the like external to the remote controller and the receiver. Hereinafter, an outline of service selection from the multi-screen will be described with reference to FIG.
[0138]
The user first switches to a multi-screen program selection mode to select a service from the multi-screen (operation 1001). Thereafter, a multi-screen as shown in FIG. 6A is displayed on the monitor 115. Thereafter, by selecting a group (operation 1003), only programs that match the group are displayed on the multi-screen.
[0139]
A group can be selected by directly selecting and pressing a key with a remote controller or by displaying the group as an OSD on a monitor as shown in FIG. 6 (2) or FIG. 6 (4). There is a method of selecting by moving the cursor from the.
[0140]
Further, as shown in FIG. 6C, the multi-screen can be switched to another multi-screen by operating a key of a remote controller or the like (operation 1002). To exit the program selection mode from the multi-screen, select one cell (program) from the multi-screen and select a service (operation 1004), or press a key to end the multi-screen program selection mode (operation 1005). What should I do?
[0141]
As described above, from among those once stored in the memory 118, those in the group selected by the user are stored again in the memory 123, and multi-screen display is performed for each group, so that a multi-screen that is easy for the user to see can be created. In addition, it becomes easy to select a service from the multi-screen.
[0142]
Further, in the fourth embodiment, when the service is held by adding the group identification information to the service identification information in the memory 123 and the information of the area to be held in the frame memory 120 is also associated, the group Separately, a multi-screen can be displayed, and furthermore, the user can specify up to the position of a cell to be displayed, and a multi-screen that is easy to view can be displayed.
[0143]
Further, in the fourth embodiment, as described in the third embodiment, the information regarding the identification of the repeater in the service identification information is looked up and acquired from the service identification information of the same repeater. With this configuration, when a moving image is displayed in a cell, the motion of the moving image can be smoothly displayed.
[0144]
(Fifth embodiment)
In the fifth embodiment of the digital broadcast receiver according to the present invention, a service selected by the user in the past is stored in a memory, and the service stored in the memory is displayed as a multi-screen.
[0145]
The configuration diagram is shown in FIG. The components other than the memory 124 and the memory 125 are the same as those of the first or second embodiment, and are assigned the same reference numerals, and the detailed description is omitted.
[0146]
The service selected by the user in the past is registered in the memory 124. At this time, the association between the service identification information and the time information indicating the time selected by the user (or the frequency information indicating the number of times selected) is held. ing.
[0147]
The memory 125 holds the association between the service identification information, the information of the multi-screen area, and the multi-screen identification information, as described later.
[0148]
As shown in FIG. 15A, the memory 124 holds the association between service identification information selected by the user in the past and time information indicating the time selected by the user. The service identification information SV0 is selected at time T1, and the service identification information SV2 is selected at time T2. 15 (2) and 15 (3) show examples of the contents held in the memory 125.
[0149]
FIG. 16 shows a processing procedure of the host CPU 116 in the multi-screen program selection mode. Hereinafter, the processing procedure will be described with reference to FIG.
[0150]
The user shifts to the multi-screen display mode through the light receiving unit 117 with a remote controller or the like or through the external input terminal 102 of the receiver.
[0151]
Thereafter, the host CPU 116 determines whether or not the service identification information selected by the user in the past is stored in the memory 124 (step 1401). As a result of the determination, if the information is not stored, the multi-screen display cannot be performed, and the fact is displayed on the monitor 115.
[0152]
If the result of the determination is that the service identification information has been retained, the host CPU 116 checks whether there is any service identification information that has not been transferred to the memory 125 among the service identification information stored in the memory 124 and selected by the user in the past. (Process 1402). If the service identification information does not exist, the host CPU 116 performs a process 1408.
[0153]
If the result of the determination is that there is service identification information that has not been transferred to the memory 125, the host CPU 116 detects the number of service identification information held in the memory 125, and the number is greater than the number of cells of the multi-screen. It is determined whether or not it is (process 1403).
[0154]
If the result of the determination is that there is not much, the host CPU 116 secures an area for storing the down-sampled video signal in the frame memory 120 and specifies that area (processing 1404).
[0155]
For example, the area 1 in the multi-screen shown in FIG. 3 is secured on the frame memory 120 and designated.
[0156]
Next, the host CPU 116 acquires one piece of service identification information that has not been transferred from the memory 124 to the memory 125 (step 1405).
[0157]
The host CPU 116 stores the acquired service identification information in the memory 125 together with the information of the area designated in the process 1404 (process 1406). At this time, information for identifying the multi-screen is added as the multi-screen identification information.
[0158]
Thereafter, the host CPU 116 enters a wait state until a predetermined time has elapsed (process 1407).
[0159]
During this time, the transport processing circuit 112 extracts a video signal based on the service identification information obtained in the process 1405, and the extracted video signal is decoded by the MPEG decoder 113, and the down-sampling processing circuit At 119, down-sampling is performed and the data is written to the selected area of the frame memory 120.
[0160]
The host CPU 116 returns to the process 1402 and repeats the same process after a predetermined time has passed while waiting in the process 1407 in the process 1407. As a result, the services of the service identification information selected by the user in the past are sequentially decoded and sequentially stored in a predetermined area of the frame memory 120.
[0161]
In this repetitive processing by the host CPU 116, the area of the frame memory 120 is secured by the number of cells of the multi-screen, or the service identification information selected by the user in the past stored in the memory 124 is transferred to the memory 125. It is done until it ends.
[0162]
The host CPU 116 determines whether the area of the frame memory 120 is secured by the number of cells of the multi-screen or the service identification information selected by the user in the past stored in the memory 124 is transferred to the memory 125. If so, processing 1408 is performed.
[0163]
In addition, the area of the frame memory 120 is secured by the number of cells of the multi-screen, and the service identification information which is not yet transferred to the memory 125 among the service identification information previously selected by the user and held in the memory 124 in the past. If there is information, the user can be notified by switching to another multi-screen and displaying on the monitor 115 that another service can be displayed as a multi-screen.
[0164]
The host CPU 116 determines whether the area of the frame memory 120 is reserved by the number of cells of the multi-screen or the service identification information selected by the user stored in the memory 124 in the past is transferred to the memory 125. Acquires the service identification information and the information of the area of the frame memory 120 from the memory 125 (processing 1408).
[0165]
The state of the memory 125 at this time is shown in FIG. As shown in FIG. 15 (2), at this point, since the processing 1402 to the processing 1407 are repeated, the memory 125 stores in the memory 124 the service identification information selected by the user in the past and the multi-screen area. Is associated with the data of the multi-screen identification information.
[0166]
The post CPU 116 designates an area of the frame memory 120 with the acquired area information, and updates the designated area with the decoded video signal (process 1409).
[0167]
Step 1410 is similar to step 1407.
[0168]
The host CPU 116 returns to step 1408 after a predetermined time has passed in step 1410, and repeats steps 1408 to 1410 thereafter.
[0169]
When the multi-screen program selection mode is entered and the above-described processes 1401 to 1410 are repeated and the multi-screen is displayed on the monitor 115, the user may switch to another multi-screen by operating a remote controller or the like.
[0170]
At that time, the frame memory 120 is cleared, and the processing of the host CPU 116 is forcibly started from the processing 1401 in FIG. 16, and the same processing is repeated thereafter. At this time, as shown in FIG. 15C, the multi-screen identification information of the multi-screen stored in the memory 125 changes from CH1 to CH2.
[0171]
Also, the user enters the multi-screen program selection mode and repeats the above-mentioned processing 1401 to processing 1410. When the multi-screen is displayed on the monitor 115, the user selects a program by moving the cursor from the multi-screen. In this case, the host CPU 116 refers to the service identification information and the multi-screen identification information corresponding to the multi-screen cell stored in the memory 125, and based on the selected cell and the currently displayed multi-screen identification information. Next, the service identification information is extracted.
[0172]
In synchronization with this, the output of the selection circuit 121 is controlled so as to select the signal from the MPEG decoder 113. The transport processing circuit 112 extracts a video signal of a service corresponding to the service identification information based on the service identification information. The extracted video signal is decoded by the MPEG decoder 113, and is output to the selection circuit 121. The information is displayed on the monitor 115 via the processing circuit 114. In this way, the program selected from the multi-screen is displayed on the monitor 115.
[0173]
The video signal held in the frame memory 120 is always displayed on the monitor 115. In addition, the memory 124 and the memory 125 may be configured by the same memory by dividing an area of information to be held. Conversely, the memory 125 may be composed of a plurality of memories.
[0174]
FIG. 17 shows an operation procedure in the multi-screen program selection mode from buttons and the like provided outside the remote controller and the receiver. Hereinafter, an outline of service selection from the multi-screen will be described with reference to FIG.
[0175]
The user first switches to the multi-screen program selection mode to select a service from the multi-screen (operation 1501). Thereafter, a multi-screen as shown in FIG. 6A is displayed on the monitor 115. As shown in FIG. 6C, the multi-screen can be switched to another multi-screen by operating keys on a remote controller or the like (operation 1502).
[0176]
To exit the program selection mode from the multi-screen, select one cell (program) from the multi-screen and select a service (operation 1503) or press a key to end the multi-screen program selection mode (operation 1504). Just do it.
[0177]
As described above, if the service identification information of the service selected by the user in the past is stored in the memory 124 and the service selected by the user in the past is displayed on the multi-screen, the user can know the history of the past service selection. Yes, and at the same time, you can select from the multi-screen.
[0178]
When displaying the service identification information from the memory 124 in the processing 1405 of FIG. 16 when displaying on the multi-screen, the following processing can be added.
[0179]
One is that the host CPU 116 refers to the time information when acquiring the service identification information from the memory 124 in the processing 1405 of FIG. 16 and displays the service on the multi-screen in a time series if the service identification information is acquired. You can go. Thereby, the service selected in the past can be displayed on the multi-screen, and the selection of the service becomes easy.
[0180]
Secondly, when holding the service selected in the past in the memory 124, the host CPU 116 holds the number of times the service has been selected as service selection count information, and in the process 1405 of FIG. When the service identification information is acquired by referring to the service selection number information at the time of acquiring the service, the service can be displayed on the multi-screen according to the selection number. This makes it possible to display a frequently selected service as a multi-screen, thereby facilitating service selection.
[0181]
Third, when acquiring the service identification information from the memory 124, the host CPU 116 refers to the identification information of the repeater from the service identification information, and displays the information on the multi-screen in order from the service of the same repeater. This makes it possible to smoothly display the motion of the moving image when displaying the moving image in the cell.
[0182]
Regardless of the information on the transmitting side, since the multi-screen can be created by the service selected by the user in the past, the services displayed on the multi-screen can be limited, and the service can be easily selected.
[0183]
【The invention's effect】
As described above, according to the present invention, the user can easily select each service to be displayed as a multi-screen child screen regardless of the transmission state.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a digital broadcast receiver according to a first embodiment of the present invention.
FIG. 2 is a diagram illustrating a processing procedure of multi-screen display according to the first embodiment.
FIG. 3 is a diagram showing a relationship between a multi-screen and an area of a frame memory 120.
FIG. 4 is a diagram showing contents held in a memory 122 according to the first embodiment.
FIG. 5 is a diagram showing an operation procedure when selecting a service from the multi-screen according to the first embodiment.
FIG. 6 is a diagram showing a display mode when displaying a multi-screen.
FIG. 7 is a diagram showing a hierarchical structure of genre information.
FIG. 8 is a diagram showing contents held in a memory 122 in a digital broadcast receiver according to a second embodiment of the present invention.
FIG. 9 is a diagram showing a display form of a multi-screen according to the second embodiment.
FIG. 10 is a block diagram showing a configuration of a digital broadcast receiver according to a fourth embodiment of the present invention.
FIG. 11 is a diagram showing contents held in a memory 118 and a memory 123 according to the fourth embodiment.
FIG. 12 is a diagram illustrating a processing procedure of multi-screen display according to the fourth embodiment.
FIG. 13 is a diagram illustrating an operation procedure when selecting a service from a multi-screen according to the fourth embodiment.
FIG. 14 is a block diagram illustrating a configuration of a digital broadcast receiver according to a fifth embodiment of the present invention.
FIG. 15 is a diagram illustrating contents held in a memory 124 and a memory 125 according to the fifth embodiment.
FIG. 16 is a diagram illustrating a processing procedure of multi-screen display according to the fifth embodiment.
FIG. 17 is a diagram illustrating an operation procedure when selecting a service from the multi-screen according to the fifth embodiment.
FIG. 18 is a diagram showing a configuration of a conventional digital broadcast receiver.
[Explanation of symbols]
110: demodulation circuit, 111: error correction circuit, 112: transport processing circuit, 113: MPEG decoder, 114: display processing circuit, 115: monitor, 116: host CPU, 117: light receiving unit, 119: downsampling processing circuit, 120: frame memory, 122: memory, 118: memory, 123: memory, 124: memory, 125 ···memory.

Claims (17)

In a digital broadcast receiver for receiving a digital broadcast in which genre information describing a genre of each service is multiplexed and transmitted in a stream in which a plurality of services are multiplexed,
Extracting means for extracting, from the stream, a video signal of a service classified into the same genre information as the genre selected by the user while switching at a predetermined timing;
Means for down-sampling the extracted video signal of the service,
Frame memory means for holding the down-sampled video signal of the service at the predetermined timing, changing the area for each service,
Display means for displaying the service video signal held in the frame memory means as a multi-screen. In a digital broadcast receiver for receiving a digital broadcast in which genre information describing a genre of each service in a hierarchical manner is transmitted in a stream in which a plurality of services are multiplexed,
Extracting means for extracting, from the stream, video signals of the respective lower-layer services classified into the same genre information as the genre selected by the user while switching at predetermined timing;
Down-sampling means for down-sampling the extracted video signal of the service,
Frame memory means for holding the down-sampled video signal of the service at the predetermined timing, changing the area for each service,
A digital broadcast receiver comprising: display means for multi-displaying the images of the lower layer services having the same genre stored in the frame memory means so as to be adjacent to each other . 3. The digital broadcast receiver according to claim 1, wherein the extracting unit extracts the video signal of the service preferentially from the same repeater. In a digital broadcast receiver for receiving a digital broadcast transmitting a stream multiplexing a plurality of services,
Selecting means for outputting, when the user selects a service group, group identification information corresponding to the group,
Memory means for holding the group identification information in a first area, and holding service identification information corresponding to the group identification information from the selection means in the second area from the first area;
Extracting means for extracting, from the stream obtained by multiplexing the plurality of services, a video signal of a service corresponding to the service identification information held in the second area of the memory means while switching at a predetermined timing;
Down-sampling means for down-sampling the extracted video signal of the service,
Frame memory means for holding the down-sampled video signal of the service at the predetermined timing, changing the area for each service,
Display means for displaying a video signal of the service held in the frame memory means as a multi-screen. The memory means, when holding the service identification information in the second area, inputs a storage position of the video signal of the service corresponding to each service identification information in the frame memory as area information, Retain in association with identification information,
5. The frame memory according to claim 4, wherein the frame memory holds the down-sampled video signal of the service in accordance with the area information held in the second area of the memory. Digital broadcast receiver. The digital broadcast receiver according to claim 4, wherein the extraction unit preferentially extracts a video signal of the service from the same repeater. In a digital broadcast receiver for receiving a digital broadcast in which genre information describing a genre of each service is multiplexed and transmitted in a stream in which a plurality of services are multiplexed,
First memory means for holding service identification information for identifying a service selected by the user in the past;
Second memory means for inputting and holding the service identification information from the first memory means;
Extracting means for extracting, from the stream obtained by multiplexing the plurality of services, a video signal of a service corresponding to the service identification information held in the second memory means while switching at a predetermined timing;
Down-sampling means for down-sampling the extracted video signal of the service,
Frame memory means for holding the down-sampled video signal of the service at the predetermined timing, changing the area for each service,
Display means for displaying a video signal of the service held in the frame memory as a multi-screen. Specifying the service identification information of the small screen selected by the selection means from the memory means, and causing the extraction means to extract a video signal of a service corresponding to the specified service identification information from the stream, 5. The digital broadcast receiver according to claim 4, further comprising control means for causing the display means to display the extracted video signal of the service instead of the multi-screen. The second memory means associates the service identification information with the respective areas of the frame memory means in which the respective service identification information is stored, so that the frame memory means changes and retains the area for each service. Holding
  Selection means for the user to select the small screen of the multi-screen,
  The service identification information of the small screen selected by the selection means is specified from the second memory means, and the extraction means outputs the video signal of the service corresponding to the specified service identification information from the stream. 8. The digital broadcast according to claim 7, further comprising: control means for extracting the multi-screen and displaying the video signal of the service corresponding to the specified service identification information on the display means. Receiving machine. The first memory means holds service identification information for identifying a service selected by the user in the past and time information on the service selected by the user in the past in association with each other;
  The second memory means, when inputting the service identification information from the first memory means, holds the service identification information with reference to the time information;
  The frame memory means holds the down-sampled video signal of the service according to the service identification information held in the second memory with reference to the time information,
  9. The digital broadcast receiver according to claim 8, wherein the display means displays the video signal of the service stored in the frame memory means in a time-series manner in accordance with the time information. The first memory means stores service identification information for identifying a service selected by the user in the past and information on the number of times the user has selected the service in the past, in association with each other;
  The second memory means, when inputting the service identification information from the first memory means, holds the service identification information with reference to the number information,
  The frame memory means holds the down-sampled video signal of the service according to the service identification information held in the second memory with reference to the number-of-times information,
  9. The digital broadcast receiving apparatus according to claim 8, wherein the display unit performs multi-display of the video signal of the service held in the frame memory unit according to the number-of-times information. Machine. 10. The digital broadcast receiver according to claim 8, wherein the second extracting unit extracts the video signal of the service preferentially from the same repeater. 10. The digital broadcast receiver according to claim 8, wherein the first memory and the second memory are configured by the same memory. 4. The method according to claim 1, wherein when the number of services is equal to or greater than the number of small screens of the multi-screen, the display means displays that there is the service that cannot be written to the frame memory means. A digital broadcast receiver according to any one of claims 4 and 7. 8. The method according to claim 1, wherein a reduction ratio of the downsampling unit at the time of the downsampling is controlled according to the number of small screens displayed as the multi-screen. 2. A digital broadcast receiver according to claim 1. The frame memory means stores each service classified into the same genre information as the genre selected by the user in order to store the service in a different area for each service. Memory means for holding in association with each area,
  Selection means for the user to select the genre and the small screen of the multi-screen,
  According to the respective areas held in the memory means, the respective services are held in the frame memory means, the services of the small screen selected by the selection means are specified from the memory means, and the extraction means 2. A control means for extracting a video signal of the specified service from the stream, and causing the display means to display the video signal of the specified service by changing to the multi-screen. 2. A digital broadcast receiver according to claim 1. The frame memory means stores the lower-layer services classified into the same genre information as the genre selected by the user in order to store the service in a different area for each service. Memory means for holding in association with each area of the memory means,
  Selection means for the user to select the genre and the small screen of the multi-screen,
  According to the respective areas held in the memory means, the respective services are held in the frame memory means, the services of the small screen selected by the selection means are specified from the memory means, and the extraction means 3. A control unit for extracting a video signal of the specified service from the stream and causing the display unit to display the video signal of the specified service by changing to the multi-screen. 2. A digital broadcast receiver according to claim 1.

Images