JP5330790B2 - Reception system, reception method, and reception program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reception system allowing a user to view content based on digital broadcast data while keeping quality at a certain level or higher, and to provide a reception method and a reception program. <P>SOLUTION: The reception system 1 includes: an external apparatus 100 for receiving digital broadcast data with low-quality broadcast data and high-quality broadcast data superposed on each other, and a terminal device 200 connected to the external apparatus 100 for reproducing the digital broadcast data. The terminal device 200 includes: a third separation part 207 for separating the low-quality broadcast data from the high-quality broadcast data based on the digital broadcast data, a reproduction part 211 reproducing data, and a determination part 209a determining low- and high-quality broadcast data to be output to the reproduction part 211 based on processing capability of the terminal device 200. The third separation part 207 outputs the data determined by the determination part 209a to the reproduction part 211. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a reception system, a reception method, and a reception program for receiving digital broadcast data in which low-definition broadcast data and high-definition broadcast data are superimposed.

  In recent years, broadcasting of digital broadcast data including one segment broadcast data and full segment broadcast data has attracted attention. In the one-segment broadcasting, one segment is used among 13 segments constituting one channel. In the full segment broadcasting, the remaining 12 segments among the 13 segments constituting one channel are used.

  The one-segment broadcast data is broadcast by a strong layer segment that is highly resistant to noise and multipath. On the other hand, full-segment broadcast data is broadcast by a segment of a weak hierarchy with low resistance to noise and multipath.

  As described above, the characteristics of the one-segment broadcast data are that the amount of information is small and resistance to noise and multipath is strong. On the other hand, the characteristics of full segment broadcast data are that the amount of information is large and the resistance to noise and multipath is weak.

In such a background, car navigation that receives one-segment broadcast data and full-segment broadcast data has been proposed. Specifically, car navigation outputs high-quality content (such as images and sounds) based on full segment broadcast data when the reception intensity of digital broadcast data is high. On the other hand, when the reception intensity of digital broadcast data is low, car navigation outputs low-quality content (such as images and sounds) based on one-segment broadcast data (for example, Non-Patent Document 1).
“Matsushita,“ 12-segment standard equipment model for HDD car navigation system “Strada” ”, [online], September 10, 2007, IT Media + D LifeStyle, [October 7, 2008 search], Internet <URL: http : //plusd.itmedia.co.jp/lifestyle/articles/0709/10/news070.html>

  Incidentally, an external device that is connected to a terminal device such as a personal computer and incorporates a tuner that receives one-segment broadcast data is known. Similarly, an external device that is connected to a terminal device such as a personal computer and incorporates a tuner that receives full segment broadcast data is also known.

  Here, the one-segment broadcast data and full-segment broadcast data received by the external device are reproduced by an application (that is, software) operating on the terminal device.

  However, the reproduction load of full segment broadcast data is high. Therefore, when full segment broadcast data is reproduced by an application (that is, software) operating on the terminal device, a load related to reproduction processing in the terminal device becomes very large. As a result, even when an external device is connected to the terminal device, a high-quality image may not be properly viewed based on the full segment broadcast data.

  Accordingly, the present invention has been made to solve the above-described problems, and a reception system and a reception system that allow a user to view content based on digital broadcast data while maintaining a certain level of quality or higher. It is an object to provide a method and a receiving program.

  In order to solve the above-described problems, the present invention has the following features. First, the first feature of the present invention is that an external device (external device 100) that receives digital broadcast data in which low-definition broadcast data (one-segment broadcast data) and high-definition broadcast data (full-segment broadcast data) are superimposed. And a receiving system (receiving system 1) that is connected to the external device and includes a terminal device (terminal device 200) that reproduces the digital broadcasting data, wherein the terminal device converts the digital broadcasting data into the digital broadcasting data. Based on this, the separation unit (third separation unit 207) that separates the low-definition broadcast data and the high-definition broadcast data, the reproduction unit (reproduction unit 211) that performs data reproduction processing, and the processing capability of the terminal device A determination unit (determination unit 209a) that determines data to be output to the reproduction unit from among the low-definition broadcast data and the high-definition broadcast data, Serial separation unit is summarized in that for outputting data determined by the determination unit to the playback unit.

  According to the first feature of the present invention, the terminal device determines data to be output to the playback unit among the low-quality broadcast data and the high-quality broadcast data based on the processing capability of the device itself, and the separation unit includes: The determined data is output to the playback unit. That is, according to the first feature of the present invention, the terminal device reproduces data determined based on the processing capability of the own device. According to such a configuration, when the processing capability of the terminal device is equal to or higher than the predetermined capability, the terminal device can reproduce high-definition broadcast data with a large load related to the reproduction processing, and the processing capability of the terminal device Is less than the predetermined capacity, it is possible to reproduce low-definition broadcast data with a small load related to reproduction processing. Accordingly, it is possible to allow the user of the terminal device to view the content based on the digital broadcast data while maintaining a certain quality or higher.

  A second feature of the present invention relates to the first feature of the present invention, wherein the determination unit determines data to be output to the playback unit based on a processing capability of the terminal device that can be allocated to the playback process. The gist is to do.

  A third feature of the present invention relates to the first feature of the present invention, wherein the determination unit determines data to be output to the reproduction unit based on an amount of information reproduced per unit time in the reproduction process. This is the gist.

  A fourth feature of the present invention relates to the first feature of the present invention, further comprising a storage unit (storage unit 208) for storing data, wherein the separation unit stores at least the high-definition broadcast data in the storage unit. The gist is to output.

  A fifth feature of the present invention is a receiving method for receiving digital broadcast data in which low-definition broadcast data and high-definition broadcast data are superimposed, and based on the digital broadcast data, the low-definition broadcast data and the In step A for separating high-definition broadcast data, in step B for determining data to be reproduced out of the low-definition broadcast data and the high-definition broadcast data based on the processing capability of the terminal device, And a step C of reproducing the determined data.

  A sixth feature of the present invention is a reception program for receiving digital broadcast data in which low-quality broadcast data and high-definition broadcast data are superimposed, and the computer transmits the low-quality broadcast data to the computer based on the digital broadcast data. A step A for separating data and the high-definition broadcast data; a step B for determining data to be reproduced among the low-definition broadcast data and the high-definition broadcast data based on the processing capability of the terminal device; The gist is to execute step C of reproducing the data determined in step B.

  According to the present invention, it is possible to provide a reception system, a reception method, and a reception program that enable a user to view content based on digital broadcast data while maintaining a certain level of quality or higher.

  Next, an embodiment of a terminal device according to the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones. Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

[First Embodiment]
Hereinafter, a receiving system according to a first embodiment of the present invention will be described with reference to the drawings. Specifically, (1) configuration of receiving system, (2) configuration of digital broadcast data, (3) configuration of external device, (4) configuration of terminal device, (5) operation of receiving system, (6) action Effects, (7) Modification 1 and (8) Modification 2 will be described.

(1) Configuration of Reception System First, the configuration of the reception system according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a diagram illustrating a receiving system 1 according to the first embodiment.

  As illustrated in FIG. 1, the reception system 1 includes an external device 100 and a terminal device 200. In the first embodiment, the receiving system 1 receives digital broadcast data in which low-quality broadcast data and high-quality broadcast data are superimposed. One segment broadcast data is illustrated as low-definition broadcast data. The full segment broadcast data is exemplified as the high-definition broadcast data.

  Here, digital broadcast data corresponding to one broadcast station is broadcast using one channel. One channel has, for example, 13 segments. One-segment broadcast data is broadcast using one segment out of 13 segments. Full segment broadcast data is broadcast using the remaining 12 segments out of 13 segments. Thus, the information amount of the one segment broadcast data is smaller than the information amount of the full segment broadcast data. In general, full segment broadcast data is scrambled, and one segment broadcast data is not scrambled.

  The external device 100 is a device that receives digital broadcast data. The external device 10 has a tuner that receives digital broadcast data. The external device 10 receives both one-segment broadcast data and full-segment broadcast data.

The external device 100 has, for example, a USB interface and is connected to the terminal device 200 by a USB cable. That is, the external device 100 is configured to be detachable from the terminal device 200. The configuration of the external device 100 will be described in detail later (see FIG. 4).

  The terminal device 200 is a terminal device such as a personal computer. The terminal device 200 is connected to the external device 100 and reproduces digital broadcast data. The configuration of the terminal device 200 will be described in detail later (see FIG. 5).

(2) Configuration of Digital Broadcast Data Hereinafter, the configuration of digital broadcast data according to the first embodiment of the present invention will be described with reference to the drawings. 2 and 3 (a) to 3 (d) are diagrams for explaining the digital broadcast data according to the first embodiment.

  As described above, digital broadcast data corresponding to one broadcast station is broadcast using one channel. On the other hand, in digital broadcasting, a plurality of digital broadcast data corresponding to each broadcasting station is broadcast. Therefore, in digital broadcasting, information (PSI: Program Specific Information) for managing a plurality of channels corresponding to each broadcasting station is broadcast. Information such as PSI is packetized.

  Digital broadcast data corresponding to one broadcast station includes information (SI; Stream Information) for managing one channel and various information (ES; Elementary Stream) such as video and audio. Digital broadcast data is packetized.

  First, the configuration of the packet will be described with reference to FIG. As shown in FIG. 2, a packet constituting digital broadcast data is constituted by a header and a payload.

  The header includes information indicating the type of payload (PID: Packet Identifier, which will be described later). The payload includes PSI, SI, video information, audio information, data information, and the like.

  As shown in FIG. 2, the header includes synchronization information (a), error display (b), start display (c), priority (d), PID (e), scramble control (f), , Additional information control (g) and order display (h).

  The synchronization information (a) is a bit string (for example, 8 bits) for identifying the head of the packet. The error display (b) is a bit string (for example, 1 bit) indicating whether there is an error in the packet. The start display (c) is a bit string (for example, 1 bit) indicating the beginning (start position) of the payload. The priority (d) is a bit string (for example, 1 bit) indicating the priority of the packet.

  PID (e) is a bit string (for example, 13 bits) indicating the type of packet (payload). As described above, the payload includes PSI, SI, video information, audio information, data information, and the like. That is, the PID indicates which information is included in the payload.

  The scramble control (f) is a bit string (for example, 2 bits) indicating a scramble method (mode). The scramble method (mode) includes a scramble method (mode).

  The additional information control (g) is a bit string (for example, 2 bits) indicating whether additional information is included. The additional information is, for example, a program reference time (PCR: Program Clock Reference).

  The order display (h) is a bit string (for example, 4 bits) indicating the continuity of packets for each PID. The order display (h) is used to determine whether or not packets are continuous for each PID.

  Second, typical packet types will be described with reference to FIGS. 3 (a) to 3 (d). As described above, the type of packet (payload) is identified by the PID.

As shown in FIGS. 3A to 3D, the types of packets (payloads) are ECM (Entitlement Control Message), video information (V), audio information (A), data information (D), and the like. is there.

  Here, the ECM includes information used to acquire a scramble key used for descrambling. For example, in the case where an odd-numbered scramble key and an even-numbered scramble key are alternately used as the scramble key, the ECM is an odd-numbered scramble key or an even-numbered scramble key. Information indicating whether or not.

  Note that the packet including the video information (V) and the packet including the audio information (A) are scrambled. The packet including the ECM and the packet including the data information (D) are not scrambled.

(3) Configuration of External Device Hereinafter, the configuration of the external device according to the first embodiment of the present invention will be described with reference to FIG. FIG. 4 is a block diagram showing the external device 100 according to the first embodiment.

  As illustrated in FIG. 4, the external device 100 includes an antenna 110, a reception processing unit 120, and an interface 130.

  The antenna 110 receives radio waves of digital broadcast data on which one segment broadcast data and full segment broadcast data are superimposed.

  The reception processing unit 120 acquires one segment broadcast data and full segment broadcast data based on the radio waves received by the antenna 110. The reception processing unit 12 acquires digital broadcast data (one segment broadcast data and full segment broadcast data) corresponding to one channel selected by the user.

  Specifically, the reception processing unit 120 performs demodulation processing and decoding processing. Specifically, the reception processing unit 120 performs synchronous detection processing, guard interval removal processing, DFT (Discrete Fourier Transform) processing, despreading processing, parallel serial conversion processing, and the like.

  The antenna 110 and the reception processing unit 120 constitute a tuner that receives digital broadcast data.

  The interface 130 is an interface for connecting to the terminal device 200. The interface 130 is, for example, a USB port. The interface 130 outputs digital broadcast data on which the one-segment broadcast data and full-segment broadcast data are superimposed to the terminal device 200.

(4) Configuration of Terminal Device (4.1) Schematic Configuration of Terminal Device Hereinafter, a schematic configuration of the terminal device according to the first embodiment of the present invention will be described with reference to FIG. FIG. 5 is a block diagram showing the terminal device 200 according to the first embodiment.

  As shown in FIG. 5, the terminal device 200 includes an interface 201, a first separation unit 202, a second separation unit 203, a channel information analysis unit 204, a CA module 205, a descrambling unit 206, a third A separation unit 207, a storage unit 208, a control unit 209, a decoding unit 210, a reproduction unit 211, and a switch group (SW1 to SW5) are provided.

  The interface 201 is an interface for connecting the external device 100. The interface 201 is, for example, a USB port. The interface 201 acquires digital broadcast data on which the one segment broadcast data and the full segment broadcast data are superimposed from the external device 100. The interface 201 outputs the digital broadcast data acquired from the external device 100 to the first separation unit 202.

  The first separation unit 202 refers to the PID included in the packet and separates the packet including PSI and SI. The first separation unit 202 outputs a packet including PSI and SI to the channel information analysis unit 204 and the third separation unit 207. The first separation unit 202 outputs other packets excluding PSI and SI to the second separation unit 203. Other packets excluding PSI and SI include packets including video information, packets including audio information, and packets including data information.

  The second separation unit 203 separates other packets excluding packets including PSI and SI. Specifically, the second separation unit 203 separates a scrambled packet that has been scrambled from a non-scrambled packet that has not been scrambled. The scramble packet includes full segment broadcast data. The non-scramble packet includes at least one-segment broadcast data. The non-scramble packet may include full segment broadcast data.

  The second separation unit 203 outputs the scramble packet to the descrambling unit 206. The second separation unit 203 outputs the non-scrambled packet to the third separation unit 207.

  The channel information analysis unit 204 analyzes a packet including PSI and SI. First, the channel information analysis unit 204 extracts a PAT (Program Association Table) from a packet including PSI. Subsequently, the channel information analysis unit 204 extracts a PID that identifies a packet including a PMT (Program Map Table) of digital broadcast data corresponding to one channel selected by the user, based on the PAT. The PAT describes a PID for identifying a packet including a PMT of digital broadcast data corresponding to each channel. In the PMT, a PID for identifying a packet including each data (ECM, video information, audio information, data information) constituting digital broadcast data is described.

  Second, the channel information analysis unit 204 extracts a PMT (Program Map Table) from the packet including the SI. Subsequently, the channel information analysis unit 204 extracts a PID for identifying a packet including each data (ECM, video information, audio information, data information) constituting the digital broadcast data based on the PMT. The channel information analysis unit 204 notifies the CA module 205 of a PID for identifying a packet including each data.

  The CA module 205 stores a scramble key used for descrambling. The CA module 205 may be built in the terminal device 200 or configured to be detachable from the terminal device 200. For example, as the CA module 205, a BCAS (BS Conditional Access System) card or the like is used. The CA module 205 outputs a scramble key to the descramble unit 206 according to the PID notified from the channel information analysis unit 204.

  The descrambling unit 206 performs descrambling processing for releasing the scramble applied to the digital broadcast data using the scramble key. Specifically, the descrambling unit 206 uses the scramble key acquired from the CA module 205 to release the scramble applied to the scramble packet acquired from the second separation unit 203. The descrambling unit 206 outputs the descrambling packet that has been descrambled to the third separation unit 207.

  The third separation unit 207 extracts the one segment broadcast data and the full segment broadcast data from the non-scramble packet and the descramble packet based on the packet including the PSI and SI acquired from the first separation unit 202. That is, the third separation unit 207 separates the one segment broadcast data and the full segment broadcast data. The one-segment broadcast data separated by the third separation unit 207 is output to the first storage unit 208a described later when SW1 is ON. The full segment broadcast data separated by the third separation unit 207 is output to the second storage unit 208b described later when SW2 is ON.

  The storage unit 208 is a storage such as an HDD that stores data. As shown in FIG. 5, the storage unit 208 includes a first storage unit 208a and a second storage unit 208b. The first storage unit 208a stores the one segment broadcast data when SW1 is ON. The second storage unit 208b stores full segment broadcast data when SW2 is ON.

  The control unit 209 controls data output to the reproduction unit 211 based on the processing capability of the terminal device 200. The configuration of the control unit 209 will be described in detail later.

  The decoding unit 210 performs a decoding process on at least one of the one segment broadcast data and the full segment broadcast data. When the SW 5 is connected to the A side, the decoding unit 210 performs a one-segment broadcast data decoding process. When SW5 is connected to the B side, the decoding unit 210 performs a decoding process of full segment broadcast data. When the one-segment broadcast data is acquired, the decoding unit 210 receives H.264 for a packet including video information. The decoding process may be performed based on H.264 / MPEG-4 AVC, and the decoding process may be performed based on MPEG-2 AAC for packets including audio information. In addition, when the full segment broadcast data is acquired, the decoding unit 210 performs decoding processing based on MPEG-2 Video for packets including video information, and based on MPEG-2 AAC for packets including audio information. The decoding process may be performed. The decoding unit 210 outputs the decoded data to the reproduction unit 211.

  The reproduction unit 211 performs reproduction processing for reproducing the data acquired from the decoding unit 210, that is, the decoded one-segment broadcast data or the decoded full-segment broadcast data. The reproduction unit 211 includes, for example, a display unit that displays video and data, a speaker that outputs sound, and the like.

(4.2) Configuration of Control Unit As shown in FIG. 5, the control unit 209 includes a determination unit 209a and a switching unit 209b.

  Based on the processing capability of the terminal device 200, the determination unit 209a determines data to be output to the reproduction unit 211 out of the one segment broadcast data and the full segment broadcast data. Specifically, the determination unit 209a determines whether or not the processing capability of the terminal device 200 is greater than or equal to a predetermined capability. When the processing capability of the terminal device 200 is equal to or greater than the predetermined capability, the determination unit 209a determines the full segment broadcast data as data to be output to the reproduction unit 211. When the processing capability of the terminal device 200 is less than the predetermined capability, the determination unit 209a determines the one-segment broadcast data as data to be output to the reproduction unit 211.

  The processing capability of the terminal device 200 is, for example, the performance of a CPU mounted on the terminal device 200. The CPU performance includes, for example, the number of clocks, the cache size, whether parallel processing can be executed (whether the number of cores is one or more), and the like.

  The switching unit 209b controls switching of SW1 to SW5. Specifically, as illustrated in FIG. 6, the switching unit 209 b controls the switching of SW <b> 1 to SW <b> 5 according to the determination result, mode, and data type by the determination unit 209 a. The mode is a viewing mode or a viewing / recording mode. Of the data types, the data type to be viewed (that is, the data type output to the playback unit 221) corresponds to the determination result of the determination unit 209a. In FIG. 6, when the full segment broadcast data is determined as data to be output to the playback unit 211 (that is, when the processing capability of the terminal device 200 is equal to or greater than the predetermined capability), the determination result is indicated by ○, When the broadcast data is determined as data to be output to the reproduction unit 211 (that is, when the processing capability of the terminal device 200 is less than the predetermined capability), the determination result is indicated by x. Of the data types, the data type to be recorded (that is, the data type stored in the storage unit 208) is at least one of one-segment broadcast data and full-segment broadcast data.

  First, a viewing mode in which only data viewing is performed and no data recording is performed will be described.

  When the full segment broadcast data is determined as data to be output to the reproduction unit 211 (that is, when the processing capability of the terminal device 200 is equal to or greater than a predetermined capability), the switching unit 209b controls switching of SW1 to SW5 according to the viewing mode A1. To do. Specifically, in the viewing mode A1, the switching unit 209b connects SW4 to the B side and connects SW5 to the B side. As a result, the full segment broadcast data separated by the third separation unit 207 is output to the reproduction unit 211 via the decoding unit 210.

  On the other hand, when the one-segment broadcast data is determined as data to be output to the reproduction unit 211 (that is, when the processing capability of the terminal device 200 is less than the predetermined capability), the switching unit 209b switches between SW1 to SW5 according to the viewing mode A2. To control. Specifically, in the viewing mode A2, the switching unit 209b connects SW3 to the B side and connects SW5 to the A side. As a result, the one segment broadcast data separated by the third separation unit 207 is output to the reproduction unit 211 via the decoding unit 210 instead of the full segment broadcast data.

  Next, a viewing / recording mode for performing both data viewing and data recording will be described.

  When the full segment broadcast data is determined as data to be output to the playback unit 211 (that is, when the processing capability of the terminal device 200 is equal to or greater than the predetermined capability), the switching unit 209b displays the viewing / recording modes B1, B2, and B3. Switching between SW1 to SW5 is controlled according to either of them.

  First, when the recording target data type is one-segment broadcast data, the switching unit 209b controls switching of SW1 to SW5 according to the viewing / recording mode B1. Specifically, in the viewing / recording mode B1, the switching unit 209b turns on SW1, connects SW4 to the B side, and connects SW5 to the B side. Thus, the full segment broadcast data separated by the third separation unit 207 is output to the reproduction unit 211 via the decoding unit 210, and the one segment broadcast data separated by the third separation unit 207 is output to the first recording unit. 208a is stored.

  Second, when the recording target data type is full segment broadcast data, the switching unit 209b controls switching of SW1 to SW5 according to the viewing / recording mode B2. Specifically, in the viewing / recording mode B2, the switching unit 209b turns on SW2, connects SW4 to the A side, and connects SW5 to the B side. Thus, the full segment broadcast data separated by the third separation unit 207 is stored in the second recording unit 208b, and the full segment broadcast data recorded in the second recording unit 208b is reproduced via the decoding unit 210. 211 is output.

  Third, when the recording target data type is both one segment broadcast data and full segment broadcast data, the switching unit 209b controls switching of SW1 to SW5 according to the viewing / recording mode B3. Specifically, in the viewing / recording mode B3, the switching unit 209b turns on both SW1 and SW2, connects SW4 to the A side, and connects SW5 to the B side. Thus, the full segment broadcast data separated by the third separation unit 207 is stored in the second recording unit 208b, and the full segment broadcast data recorded in the second recording unit 208b is reproduced via the decoding unit 210. 211 is output. Further, the one segment broadcast data separated by the third separation unit 207 is stored in the first recording unit 208a.

  On the other hand, when the one-segment broadcast data is determined as data to be output to the reproduction unit 211 (that is, when the processing capability of the terminal device 200 is less than the predetermined capability), according to any of the viewing / recording modes B4, B5, and B6. Controls switching of SW1 to SW5.

First, when the recording target data type is one-segment broadcast data, the switching unit 209b controls switching of SW1 to SW5 according to the viewing / recording mode B4. Specifically, in the viewing / recording mode B4, the switching unit 209b turns on SW1, connects SW3 to the A side, and connects SW5 to the A side. Thus, the one segment broadcast data separated by the third separation unit 207 is stored in the first recording unit 208a, and the one segment broadcast data recorded in the first recording unit 208a is reproduced via the decoding unit 210. Secondly, when the recording target data type is full segment broadcast data, the switching unit 209b controls switching of SW1 to SW5 according to the viewing / recording mode B5. Specifically, in the viewing / recording mode B5, the switching unit 209b turns on SW2, connects SW3 to the B side, and connects SW5 to the A side. Thereby, the one segment broadcast data separated by the third separation unit 207 is output to the reproduction unit 211 via the decoding unit 210, and the full segment broadcast data separated by the third separation unit 207 is output to the second recording unit. 208b.

  Third, when the recording target data type is both one-segment broadcast data and full-segment broadcast data, the switching unit 209b controls switching of SW1 to SW5 according to the viewing / recording mode B6. Specifically, in the viewing / recording mode B6, the switching unit 209b turns on both SW1 and SW2, connects SW3 to the A side, and connects SW5 to the A side. Thus, the one segment broadcast data separated by the third separation unit 207 is stored in the first recording unit 208a, and the one segment broadcast data recorded in the first recording unit 208a is reproduced via the decoding unit 210. 211 is output. The full segment broadcast data separated by the third separation unit 207 is stored in the second recording unit 208b.

  As described above, when the processing capability of the terminal device 200 is less than the predetermined capability, the switching unit 209b always connects the SW5 to the A side, so that the one-segment broadcast data with a small load related to the reproduction processing is reproduced by the reproducing unit 211. Is output.

(5) Operation of Reception System Next, the operation of the reception system 1 according to the first embodiment of the present invention will be described with reference to FIG. FIG. 7 is a flowchart showing the operation of the receiving system 1 according to the first embodiment.

  As shown in FIG. 7, in step S10, the external device 100 receives digital broadcast data on which one-segment broadcast data and full-segment broadcast data are superimposed.

  In step S20, the terminal device 200 separates the one-segment broadcast data and the full-segment broadcast data based on the digital broadcast data acquired from the external device 100.

  In step S30, the terminal device 200 determines data to be output to the reproduction unit 211 among the one segment broadcast data and the full segment broadcast data based on the processing capability of the own device. If the terminal device 200 determines to output the one-segment broadcast data to the reproducing unit 211, the terminal device 200 proceeds to step S40. On the other hand, if the terminal device 200 determines to output the full segment broadcast data to the reproduction unit 211, the terminal device 200 proceeds to step S50.

  In step S40, the terminal device 200 performs a reproduction process of the one segment broadcast data.

  In step S50, the terminal device 200 performs reproduction processing of full segment broadcast data.

  In step S40 or step S50, at least one of the one segment broadcast data or the full segment broadcast data may be stored in the storage unit 208.

(6) Operation / Effect According to the reception system 1 according to the first embodiment of the present invention, the terminal device 200, based on the processing capability of its own device, of the one segment broadcast data and the full segment broadcast data, the playback unit Data to be output to 211 is determined, and the determined data is played back by the playback unit 211. According to such a configuration, when the processing capability of the terminal device 200 is equal to or greater than the predetermined capability, the terminal device 200 reproduces the full segment broadcast data with a large load related to the reproduction processing, and the processing capability of the own device is predetermined. If it is less than the capability, the one-segment broadcast data with a small load related to the reproduction process is reproduced.

  Here, when full-segment broadcast data is played back when the processing capability of the terminal device 200 is low, a high-quality image may not be properly viewed. As a result, the quality of the content is worse compared with the case where the one-segment broadcast data is reproduced. Therefore, a certain level of quality can be achieved by playing back one-segment broadcast data when the processing capability of the own device is less than the predetermined capability, and playing full segment broadcast data when the processing capability of the own device is greater than or equal to the predetermined capability. While maintaining the above, the user of the terminal device 200 can view the content based on the digital broadcast data.

  Further, according to the receiving system 1 according to the first embodiment of the present invention, when the terminal device 200 determines that the processing capability of the terminal device 200 is less than the predetermined capability, the terminal device 200 reproduces the one-segment broadcast data and performs full Segment broadcast data can be stored (viewing / recording modes B5 and B6). According to such a configuration, the user of the terminal device 200 can immediately view the one-segment broadcast and can view the full-segment broadcast later. Therefore, it is possible to achieve both viewing of one segment broadcasting and viewing of full segment broadcasting.

(7) Modification 1
Below, the terminal device 200 which concerns on the modification 1 of 1st Embodiment of this invention is demonstrated. In the first embodiment of the present invention described above, the case where the determination unit 209a of the terminal device 200 determines the data to be output to the reproduction unit 211 based on the processing capability of the terminal device 200 has been described. It is not limited to.

  For example, the determination unit 209a may determine data to be output to the reproduction unit 211 based on the processing capability of the terminal device 200 that can be assigned to the reproduction processing in the reproduction unit 211 in addition to the processing capability of the terminal device 200.

  The processing capability of the terminal device 200 that can be assigned to the reproduction process includes an unused rate of the CPU of the terminal device 200. The determination unit 209a according to the first modification monitors the CPU usage rate of the terminal device 200 in order to determine the processing capability of the terminal device 200 that can be assigned to the reproduction process, that is, the CPU unused rate. For example, when the CPU usage rate of the terminal device 200 is less than a predetermined value, the determination unit 209a determines that the processing capability of the terminal device 200 that can be assigned to the reproduction process is greater than or equal to the predetermined value. On the other hand, when the CPU usage rate of the terminal device 200 is equal to or greater than a predetermined value, the determination unit 209a determines that the processing capability of the terminal device 200 that can be assigned to the reproduction process is less than the predetermined value.

  For example, when the processing capability of the terminal device 200 is equal to or greater than a predetermined capability and the processing capability of the terminal device 200 that can be assigned to the reproduction process is equal to or greater than a predetermined value, the determination unit 209a reproduces the full segment broadcast data. It is determined as data to be output to the unit 211. In addition, the determination unit 209a, for example, in the case of at least one of the case where the processing capability of the terminal device 200 is less than a predetermined capability, or the case where the processing capability of the terminal device 200 that can be allocated to the reproduction process is less than a predetermined value The one-segment broadcast data is determined as data to be output to the playback unit 211.

(8) Modification 2
Below, the terminal device 200 which concerns on the modification 1 of 1st Embodiment of this invention is demonstrated. In the first embodiment of the present invention described above, the case where the determination unit 209a of the terminal device 200 determines the data to be output to the reproduction unit 211 based on the processing capability of the terminal device 200 has been described. It is not limited to.

  For example, the determination unit 209a may determine the data to be output to the reproduction unit 211 based on the amount of information reproduced per unit time in the reproduction processing in the reproduction unit 211 in addition to the processing capability of the terminal device 200.

  For example, the determination unit 209a according to the second modification monitors the bit rate of digital broadcast data as the amount of information to be reproduced per unit time in the reproduction process. For example, when the bit rate of the digital broadcast data is equal to or greater than a predetermined value, the determination unit 209a determines that the amount of information reproduced per unit time in the reproduction process is equal to or greater than the predetermined value. On the other hand, for example, when the bit rate of the digital broadcast data is less than a predetermined value, the determination unit 209a determines that the amount of information reproduced per unit time in the reproduction process is less than the predetermined value.

  For example, even when the processing capability of the terminal device 200 is equal to or greater than a predetermined capability, the determination unit 209a determines that the amount of information to be reproduced per unit time in the reproduction process is equal to or greater than a predetermined value. The segment broadcast data is determined as data to be output to the playback unit 211. Thereby, the load in the reproducing part 211 can be reduced. For example, even when the processing capability of the terminal device 200 is less than a predetermined capability, the determination unit 209a determines that the amount of information to be reproduced per unit time in the reproduction process is less than a predetermined value. The full segment broadcast data is determined as data to be output to the reproduction unit 211. As a result, the quality of the content to be viewed by the user can be temporarily improved.

[Second Embodiment]
Hereinafter, a receiving system according to a second embodiment of the present invention will be described with reference to the drawings. In the following, differences between the first embodiment and the second embodiment described above will be mainly described.

  Specifically, in the first embodiment described above, the one segment broadcast data and the full segment broadcast data are stored in a separated state. On the other hand, in the second embodiment, the one segment broadcast data and the full segment broadcast data are stored in a mixed state.

(1) Configuration of Terminal Device (1.1) Schematic Configuration of Terminal Device Hereinafter, a schematic configuration of a terminal device according to the second embodiment of the present invention will be described with reference to FIG. FIG. 8 is a block diagram illustrating a terminal device 300 according to the second embodiment.

  As shown in FIG. 8, the terminal device 300 includes an interface 301, a first separation unit 302, a second separation unit 303, a channel information analysis unit 304, a CA module 305, a descrambling unit 306, A separation unit 307, a storage unit 308, a control unit 309, a decoding unit 310, a reproduction unit 311, a mixing unit 312 and a switch group (SW6 to SW8) are provided. The interface 301, the channel information analysis unit 304, the CA module 305, and the reproduction unit 311 are the same as the interface 201, the channel information analysis unit 204, the CA module 205, and the reproduction unit 211 in the first embodiment described above. Description is omitted.

  The main differences from the first embodiment described above are that the mixing unit 312 is connected to the location where the third separation unit 207 in the first embodiment is connected, and the third separation unit 307 stores the memory. It is connected between the unit 308 and the decoding unit 310.

  The first separation unit 302 refers to the PID included in the packet and separates the packet including PSI and SI. The first separation unit 302 outputs a packet including PSI and SI to the channel information analysis unit 304 and the mixing unit 312. The first separation unit 302 outputs other packets excluding PSI and SI to the second separation unit 303. Other packets excluding PSI and SI include packets including video information, packets including audio information, and packets including data information.

  The second separation unit 303 separates other packets excluding packets including PSI and SI. Specifically, the second separation unit 303 separates the scrambled scrambled packet from the non-scrambled non-scrambled packet. The scramble packet includes full segment broadcast data. The non-scramble packet includes at least one-segment broadcast data. The non-scramble packet may include full segment broadcast data.

  The second separation unit 303 outputs the scrambled packet to the descrambling unit 306. The second separation unit 303 outputs the non-scrambled packet to the mixing unit 312.

  The descrambling unit 306 performs descrambling processing for releasing the scramble applied to the digital broadcast data using the scramble key. Specifically, the descrambling unit 306 uses the scramble key acquired from the CA module 305 to release the scramble applied to the scramble packet acquired from the second separation unit 303. The descrambling unit 306 outputs the descrambled packet that has been descrambled to the mixing unit 312.

  The mixing unit 312 generates mixed data obtained by mixing the non-scramble packet and the descramble packet based on the packet including the PSI and SI acquired from the first separation unit 302. The mixed data generated by the mixing unit 312 is output to the storage unit 308 when SW6 is ON. The mixed data generated by the mixing unit 312 is output to the third separation unit 307 when the SW 7 is connected to the B side.

  The storage unit 208 is a storage such as an HDD that stores data. The storage unit 208 stores the mixed data when SW6 is ON. The mixed data stored in the storage unit 208 is output to the third separation unit 307 when the SW 7 is connected to the A side.

  The control unit 209 controls data output to the reproduction unit 211 based on the processing capability of the terminal device 300. The configuration of the control unit 209 will be described in detail later.

  The third separation unit 307 extracts one segment broadcast data and full segment broadcast data from the mixed data based on the packet including PSI and SI acquired from the first separation unit 302. That is, the third separation unit 307 separates the one segment broadcast data and the full segment broadcast data.

  Specifically, the third separation unit 307 acquires mixed data from the storage unit 208 when SW6 is ON and SW7 is connected to the A side. The third separation unit 307 acquires the mixed data from the mixing unit 312 when the SW 7 is connected to the B side. The third separation unit 307 separates the acquired mixed data into one segment broadcast data and full segment broadcast data. When the SW 8 is connected to the A side, the one segment broadcast data among the data separated by the third separation unit 307 is output to the decoding unit 310. When SW8 is connected to the B side, full segment broadcast data among the data separated by the third separation unit 307 is output to the decoding unit 310.

  The decoding unit 310 performs a decoding process on at least one of the one segment broadcast data and the full segment broadcast data. When the SW 8 is connected to the A side, the decoding unit 310 performs the one segment broadcast data decoding process. When the SW 8 is connected to the B side, the decoding unit 310 performs a decoding process of full segment broadcast data. The decoding unit 310 outputs the decoded data to the reproduction unit 311.

(1.2) Configuration of Control Unit The control unit 309 includes a determination unit 309a and a switching unit 309b as illustrated in FIG.

  Based on the processing capability of the terminal device 300, the determination unit 309a determines data to be output to the reproduction unit 311 out of the one segment broadcast data and the full segment broadcast data. Specifically, the determination unit 309a determines whether or not the processing capability of the terminal device 300 is greater than or equal to a predetermined capability. The determination unit 309 a determines the full segment broadcast data as data to be output to the reproduction unit 311 when the processing capability of the terminal device 300 is equal to or greater than the predetermined capability. When the processing capability of the terminal device 300 is less than the predetermined capability, the determination unit 309a determines the one-segment broadcast data as data to be output to the reproduction unit 311.

  The processing capability of the terminal device 300 is, for example, the performance of the CPU mounted on the terminal device 300, as in the first embodiment described above. The CPU performance includes, for example, the number of clocks, the cache size, whether parallel processing can be executed (whether the number of cores is one or more), and the like.

  The switching unit 309b controls switching of SW6 to SW8. Specifically, as illustrated in FIG. 9, the switching unit 309 b controls switching of SW <b> 6 to SW <b> 8 according to the determination result by the determination unit 309 a and the mode. The mode is a viewing mode or a viewing / recording mode. In the viewing / recording mode, mixed data in which one segment broadcast data and full segment broadcast data are mixed is recorded. The viewing target data type (that is, the data type output to the playback unit 311) corresponds to the determination result of the determination unit 309a. In FIG. 9, when the full segment broadcast data is determined as data to be output to the playback unit 311 (that is, when the processing capability of the terminal device 300 is equal to or greater than the predetermined capability), the determination result is indicated by ○ When the broadcast data is determined as data to be output to the playback unit 311 (that is, when the processing capability of the terminal device 300 is less than the predetermined capability), the determination result is indicated by x.

  First, a viewing mode in which only data viewing is performed and no data recording is performed will be described.

  When the full segment broadcast data is determined as data to be output to the playback unit 311 (that is, when the processing capability of the terminal device 300 is equal to or greater than a predetermined capability), the switching unit 309b controls switching of SW6 to SW8 according to the viewing mode C1. To do. Specifically, in the viewing mode C1, the switching unit 309b connects SW7 to the B side and connects SW8 to the B side. Thus, the mixed data output from the mixing unit 312 is separated by the third separation unit 307, and the full segment broadcast data separated by the third separation unit 307 is output to the reproduction unit 311 via the decoding unit 310. .

  On the other hand, when the one-segment broadcast data is determined as data to be output to the playback unit 311 (that is, when the processing capability of the terminal device 300 is less than the predetermined capability), the switching unit 309b switches between SW6 to SW8 according to the viewing mode C2. To control. Specifically, in the viewing mode C2, the switching unit 309b connects SW7 to the B side and connects SW8 to the A side. As a result, the mixed data output from the mixing unit 312 is separated by the third separation unit 307, and the one-segment broadcast data separated by the third separation unit 307 passes through the decoding unit 310 instead of the full-segment broadcast data. The data is output to the playback unit 311.

  Next, a viewing / recording mode for performing both data viewing and data recording will be described.

  When the full segment broadcast data is determined as data to be output to the playback unit 311 (that is, when the processing capability of the terminal device 300 is greater than or equal to the predetermined capability), the switching unit 309b switches SW6 to SW8 according to the viewing / recording mode D1. Control the switching of Specifically, in the viewing / recording mode D1, the switching unit 309b turns on SW6, connects SW7 to the A side, and connects SW8 to the B side. When SW6 is ON and SW7 is connected to the A side, the mixed data output from the mixing unit 312 is stored in the storage unit 208, and the mixed data stored in the storage unit 208 is stored in the third separation unit. It is output to 307. Then, by connecting SW 8 to the B side, the full segment broadcast data separated by the third separation unit 307 is output to the reproduction unit 311 via the decoding unit 310.

  On the other hand, when the one-segment broadcast data is determined as data to be output to the playback unit 311 (that is, when the processing capability of the terminal device 300 is less than the predetermined capability), the switching unit 309b switches the SW6 according to the viewing / recording mode D2. Controls switching of .about.SW8. Specifically, in the viewing / recording mode D2, the switching unit 309b turns on SW6, connects SW7 to the A side, and connects SW8 to the B side. When SW6 is ON and SW7 is connected to the A side, the mixed data output from the mixing unit 312 is stored in the storage unit 308, and the mixed data stored in the storage unit 308 is stored in the third separation unit. It is output to 307. Then, by connecting the SW 8 to the A side, the one segment broadcast data separated by the third separation unit 307 is output to the reproduction unit 311 via the decoding unit 310.

  As described above, when the processing capability of the terminal device 300 is less than the predetermined capability, the switching unit 309b always connects the SW8 to the A side, so that the one-segment broadcast data with a small load related to the reproduction processing is reproduced by the reproducing unit 311. Is output.

(2) Operation / Effect According to the reception system 1 according to the second embodiment of the present invention, the terminal device 300 can reproduce a playback unit of the one segment broadcast data and the full segment broadcast data based on the processing capability of the own device. The data to be output to 311 is determined, and the determined data is played back by the playback unit 311. According to such a configuration, as in the first embodiment described above, when the processing capability of the terminal device 300 is equal to or greater than the predetermined capability, the terminal device 300 transmits full segment broadcast data with a large load related to reproduction processing. If the processing capability of the own device is less than the predetermined capability, the one-segment broadcast data with a small load related to the playback processing can be played back. Accordingly, the user of the terminal device 300 can view the content based on the digital broadcast data while maintaining a certain quality or higher.

  Further, according to the receiving system 1 according to the second embodiment of the present invention, the terminal device 300 can store mixed data obtained by mixing one segment broadcast data and full segment broadcast data (viewing / recording mode D2). ). According to such a configuration, the user of the terminal device 300 can immediately view the one segment broadcast and can view both the one segment broadcast and the full segment broadcast later. Therefore, both viewing of the one segment broadcast and viewing of the full segment broadcast can be achieved, and the user can select the broadcast to view after recording the broadcast.

[Other Embodiments]
Although the contents of the present invention have been disclosed through the embodiments of the present invention as described above, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  For example, in the first embodiment described above, a case has been described in which the switching unit 209b controls switching of SW1 to SW5 according to the viewing mode or the viewing / recording mode. However, the switching unit 209b performs only data recording, The switching of SW1 to SW5 may be controlled in accordance with a recording mode in which no viewing is performed. For example, in the recording mode in which the one-segment broadcast data is recorded, the switching unit 209b turns on SW1 and turns off SW2. Further, for example, in the recording mode in which full segment broadcast data is recorded, the switching unit 209b turns off SW1 and turns on SW2. Further, for example, in the recording mode for recording both one-segment broadcast data and full-segment broadcast data, the switching unit 209b turns on both SW1 and SW2.

  Further, for example, a program for causing a computer to execute the operation of the reception system 1 (that is, the flow shown in FIG. 7) may be provided. A storage medium storing such a program may be provided. The storage medium storing the program is, for example, a CD-ROM attached to the terminal device 200.

  Of course, full segment broadcast data may include caption information in addition to video information, audio information, and data information.

  Moreover, in 1st Embodiment mentioned above, it illustrated about the digital broadcast data containing one segment broadcast data and full segment broadcast data. However, digital broadcast data is not limited to this.

  As described above, the present invention naturally includes various embodiments that are not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

It is a figure showing receiving system 1 concerning a 1st embodiment. It is a figure for demonstrating the digital broadcast data which concern on 1st Embodiment. It is a figure for demonstrating the digital broadcast data which concern on 1st Embodiment. 1 is a block diagram showing an external device 100 according to a first embodiment. It is a block diagram which shows the terminal device 200 which concerns on 1st Embodiment. It is a figure which shows the example of switching of SW group which concerns on 1st Embodiment. It is a flowchart which shows operation | movement of the receiving system 1 which concerns on 1st Embodiment. It is a block diagram which shows the terminal device 300 which concerns on 2nd Embodiment. It is a figure which shows the example of switching of SW group which concerns on 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Reception system, 100 ... External apparatus, 110 ... Antenna, 120 ... Reception processing part, 130 ... Interface, 200 ... Terminal apparatus, 201 ... Interface, 202 ... 1st separation part, 203 ... 2nd separation part, 204 ... Channel Information analysis unit, 205 ... CA module, 206 ... descramble unit, 207 ... third separation unit, 208 ... storage unit, 208a ... first storage unit, 208b ... second storage unit, 209 ... control unit, 209a ... determination unit 209b ... Switching unit 210 ... Decoding unit 211 ... Reproducing unit 300 ... Terminal device 301 ... Interface 302 ... First separation unit 303 ... Second separation unit 304 ... Channel information analysis unit 305 ... CA module 306, a descrambling unit, 307, a third separation unit, 308, a storage unit, 309, a control unit, 309a, a determination unit, 309b. Switching unit, 310 ... decoding unit, 311 ... playback unit, 312 ... mixer, SW1 to SW8 ... switch.

Claims (5)

A receiving system comprising: an external device that receives digital broadcast data in which low-definition broadcast data and high-definition broadcast data are superimposed; and a terminal device that is connected to the external device and reproduces the digital broadcast data. And
The terminal device
A separation unit that separates the low-definition broadcast data and the high-definition broadcast data based on the digital broadcast data;
A playback unit for performing data playback processing;
A determination unit that determines data to be output to the reproduction unit, out of the low-definition broadcast data and the high-definition broadcast data, based on the processing capability of the terminal device ;
A storage unit for storing data ,
The separation unit outputs the data determined by the determination unit to the reproduction unit and outputs at least the high-definition broadcast data to the storage unit .   The receiving system according to claim 1, wherein the determination unit determines data to be output to the reproduction unit based on a processing capability of the terminal device that can be assigned to the reproduction process.   The receiving system according to claim 1, wherein the determination unit determines data to be output to the reproduction unit based on an information amount reproduced per unit time in the reproduction process. A reception method for receiving digital broadcast data in which low-definition broadcast data and high-definition broadcast data are superimposed,
Separating the low-definition broadcast data and the high-definition broadcast data based on the digital broadcast data;
Step B of determining data to be reproduced among the low-definition broadcast data and the high-definition broadcast data based on the processing capability of the terminal device;
And a step C for reproducing the data determined in step B and outputting at least the high-definition broadcast data to a storage unit for storing the data . A reception program for receiving digital broadcast data in which low-definition broadcast data and high-definition broadcast data are superimposed,
Separating the low-definition broadcast data and the high-definition broadcast data based on the digital broadcast data;
Step B of determining data to be reproduced among the low-definition broadcast data and the high-definition broadcast data based on the processing capability of the terminal device;
A receiving program that reproduces the data determined in step B and causes at least the step C to output the high-definition broadcast data to a storage unit that stores the data .

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