JP6605685B2 - Transmission / reception method - Google Patents

Description

  The present invention relates to a transmission / reception method.

  MPEG4-AAC (Moving Picture Experts Group 4-Advanced Audio Coding) (1ch, 2ch, 5.1ch, 7.1ch, 22.2ch) as an audio stream profile in a digital television broadcasting system for advanced BS / advanced broadband CS broadcasting And MPEG4-ALS (Moving Picture Experts Group 4-Audio Lossless Coding) (2ch, 5.1ch) is planned. As a means for outputting these audio streams from the receiving device to external audio devices (including AV amplifiers, sound bars, etc.), optical cables / coaxial cables conforming to the S / PDIF (Sony Philips Digital Interface) standard, or HDMI ( The transmission is performed using an HDMI cable standardized by (registered trademark) -Forum (High-Definition Multimedia Interface-Forum). In both cases, the signal transmission method is standardized by IEC61937.

  However, the bit rate of Audio Stream that can be transmitted with the current S / PDIF standard is up to about 1.5 Mbps, and MPEG4-AAC can be transmitted with the current S / PDIF standard up to 7.1ch. However, in 22.2ch, the bit rate is insufficient and transmission is impossible. For this reason, IEC61937 has been revised and studies are underway to expand the transmission rate to about 3 Mbps by double the clock frequency during transmission. Furthermore, in the case of MPEG4-ALS 5.1ch, the maximum bit rate of the stream is about 7.3 Mbps, so studies are underway to support transmission clock frequencies up to 8x speed so that this can be transmitted.

  Currently, in digital television broadcasting, HDTV (High Definition Television) video signals with 1920 or 1440 horizontal pixels and 1080 vertical pixels are mainly used. Is now required. Therefore, standardization of ultra-high-definition television broadcasting by 4K (3840 × 2160) 4K or 16K (7680 × 4320) 8K UHDTV (Ultra High Definition Television) compared to HDTV. It is being advanced.

  By the way, in the current digital terrestrial television broadcasting, a section format table called CDT (Common Data Table) is applied to transmission of service logo data such as a logo mark used in a program column. ARIB TR-B14 Version 5.9 of the first edition 5.4, in the CDT transmission, regarding the section_number field, “There is a complete section from 0 to the number indicated by last_section_number. For service logo data transmission , The logo of each size is transmitted in the section of section_number that matches the logo_type value. " This means that when logo data with a certain logo_type value is transmitted, all types of logo data from 0 to the logo_type value are transmitted in units of one section (one section per logo). means.

"Receiver Standard for Advanced Broadband Satellite Digital Broadcasting" ARIB STD-B63 1.1 Version Revised March 17, 2015, Japan Radio Industry Association “Media transport system standard by MMT in digital broadcasting” ARIB STD-B60 1.4 version, formulated on September 30, 2015, Japan Radio Industry Association "Digital Terrestrial Television Broadcasting Operation Regulations" ARIB TR-B14 Version 5.9 Revised July 3, 2015 Volume 1

  The problem of this embodiment is to provide a broadcasting system, its transmitting apparatus, and receiving apparatus that solve the problems that occur in a digital television broadcasting system when performing advanced BS / advanced broadband CS broadcasting.

  In the transmission / reception method according to the embodiment, the logo data indicating the logo is transmitted by the TLV stream in the section format table CDT (Common Data Table) based on TLV (Type Length Value) / MMT (MPEG Media Transport). This is a transmission / reception method.

In this transmission / reception method,
The logo data is prepared according to the number of pixels,
The logo data by number of pixels is identified by the logo type,
The logo transmission descriptor arranged in the descriptor area of the service description table transmitted by the TLV stream changes depending on the logo transmission type,
When the logo transmission type of the logo transmission descriptor is 0x01, the logo transmission descriptor is
Logo identification that describes the ID of the logo data defined in the service description table;
A logo version number describing the version number of the logo identification;
Download data identification representing the identification of the data to be downloaded;
For each type of logotype, the start section number that represents the first section number to transmit the logotype and logo data of the logotype divided and the number of transmission sections that represents the number of sections that transmit the logotype logo data And including
The logo version number is after the logo identification,
There is the download data identification after the logo version number,
After the download data identification is the logotype,
There is the starting section number after the logotype,
The transmission section number is after the start section number;
The transmitter transmits the logo data identified by the logo type by dividing it into CDT sections having consecutive section numbers,
The receiving device acquires the logo data based on the start section number and the number of transmission sections included in the logo transmission descriptor arranged in the descriptor area of the service description table transmitted by the TLV stream. .

The block diagram which shows the structure of the broadcast receiving apparatus in advanced BS / advance broadband CS broadcasting which concerns on the process at the time of the audio | voice stream switching of 1st Embodiment. The block diagram for demonstrating the switching of an audio profile when the broadcast receiver shown in FIG. 1 and AV amplifier are connected. The figure which shows the operation | movement at the time of receiving the broadcast from which the audio asset (audio | voice mode) changes from AAC 2ch to ALS 2ch in the broadcast receiving apparatus and external AV amplifier in a conventional system. The figure which shows the operation | movement when the audio | voice mode changes from MPEG4-AAC 2ch to MPEG4-AAC 5.1ch in the broadcast receiving apparatus and external AV amplifier in a conventional system. The figure which shows the operation | movement when the audio | voice mode changes from MPEG4-AAC 2ch to MPEG4-AAC 22.2ch in the broadcast receiving apparatus and external AV amplifier in a conventional system. The figure which shows the operation | movement at the time of receiving the broadcast which changes from AAC 2ch to AAC 22.2ch, when the profile is B connection mode in the broadcast receiving apparatus shown in FIG. The figure which shows the operation | movement at the time of receiving the broadcast which changes from AAC 2ch to AAC 22.2ch, when the profile is A connection mode in the broadcast receiver shown in FIG. The flowchart for demonstrating the prior mode setting of a profile in the broadcast receiver shown in FIG. The flowchart for demonstrating the switching process at the time of broadcast reception in the broadcast receiver shown in FIG. The block diagram which shows the structure of the transmitter of the digital television broadcasting system which concerns on the logo process of 1st Embodiment. The figure for demonstrating the area | region which stores the process result of the logo data modularization part of the transmitter shown in FIG. The figure which shows the data structure of CDT used by the CDT sectioning part of the transmitter shown in FIG. The figure which shows the data structure of the logo data distribution descriptor of the transmitter shown in FIG. The block diagram which shows the structure of the receiver of the digital television broadcasting system which concerns on the logo process of 1st Embodiment. The flowchart for demonstrating the processing operation regarding the logo data of the receiver shown in FIG. The block diagram which shows the structure of the transmitter of the digital television broadcasting system of 2nd and 3rd embodiment. The figure which shows the data structure which expanded the MH-logo transmission descriptor in the transmitter shown in FIG. The flowchart for demonstrating the processing operation of the transmitter of the digital television broadcasting system which concerns on 3rd Embodiment. The figure which shows the data structure regarding data_module_byte of the processing operation shown in FIG. The figure which shows the other data structure regarding data_module_byte of the processing operation shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  The transmission / reception apparatus of the embodiment can multiplex-transmit any number of logo data of different types for each logo identification in multiple sections of the common data table information with a size that exceeds the amount of data that can be sent in one section of the common data table information. It is a simple transmitting / receiving device.

  The transmission device of the embodiment can multiplex and transmit any number of logo data of different types for each logo identification in a plurality of sections of the common data table information with a size that exceeds the amount of data that can be sent in one section of the common data table information. It is a transmitter used for a simple transmission / reception system.

  The receiving apparatus of the embodiment can multiplex-transmit any number of logo data of different types for each logo identification in multiple sections of the common data table information with a size that exceeds the amount of data that can be sent in one section of the common data table information It is a receiver used for a simple transmission / reception system.

  When the IEC61937 defines the 2 times mode and the 8 times mode of the transmission clock, it is possible to manufacture a broadcast receiving apparatus and an audio device that can transmit up to MPEG4-ALS 5.1ch according to the standard. However, in order to operate the transmission clock at 2 × speed or 8 × speed, it is necessary to use a dedicated part or the like, which increases the cost of the product.

  In actual broadcasting, considering that most of the audio is MPEG4-AAC 2ch or 5.1ch, in the case of audio equipment with low cost, up to 1x speed that can handle up to 1.5Mbps equivalent to the conventional one. It is desirable to make a distinction such that, for high-end models that support MPEG4-AAC 22.2ch and MPEG4-ALS, only up to 2x or 8x speed is supported. However, when an audio device is connected to the receiving device using an optical cable or coaxial cable, there is a means for the receiving device to know how many times the connected audio device supports (which profile is supported). Absent. Therefore, unless some setting is performed by the user's operation on the receiving device side, the problem is that the double-speed mode sound is output to an audio device that does not support the double-speed mode sound, and no sound is produced during a certain broadcast program. Will occur.

  That is, in a broadcast receiving apparatus that receives a broadcast in which a first audio signal and a second audio signal are selectively transmitted and outputs the received audio signal to an externally connected audio device, There are a first transmission clock frequency and a second transmission clock frequency as transmission clock frequencies for audio signal transmission between them, and the first audio signal can be transmitted at both the first transmission clock frequency and the second transmission clock frequency. When the second audio signal can be transmitted only at the second transmission clock frequency, the audio signal is output at the second transmission clock frequency to an audio device that does not support the second transmission clock frequency. The problem is that no sound is produced.

  Further, since a plurality of voice modes are transmitted simultaneously and can be arbitrarily selected on the receiving side, it is desirable to identify and display the voice modes to the user.

  According to the embodiment, there are a first transmission clock frequency and a second transmission clock frequency as transmission clock frequencies for audio signal transmission with an externally connected audio device, and the first audio signal is a first transmission clock. When transmission is possible at both the frequency and the second transmission clock frequency, and the second audio signal can be transmitted only at the second transmission clock frequency, a configuration suitable for the corresponding transmission clock frequency of the connected audio device A broadcast system, a broadcast transmission device, a broadcast reception device, a broadcast transmission / reception method, a broadcast transmission method, and a broadcast reception method that can output the audio signal received by the user and that can identify and display the audio mode to the user are provided. The

  In addition, for example, in the above-described logo data transmission method in digital television broadcasting, logo data having a size exceeding one section, in other words, a size extending over a plurality of sections cannot be transmitted. There is a problem that it is not possible to select and transmit only logo_type logo data of a required value. For this reason, in the ultra-high definition of digital television broadcasting, the expandability, flexibility, transmission efficiency, etc. of logo data operation are impaired.

  According to the embodiment, there is also provided a broadcasting system capable of expanding the operation of logo data to improve flexibility, transmission efficiency, and the like, and its transmitting device and receiving device, when the image has a very high definition.

(First embodiment)
Hereinafter, a transmission device, a reception device, a transmission / reception device, and a method thereof according to the first embodiment will be described with reference to FIGS.

  The first embodiment is roughly divided into a process when the audio stream is switched and a part related to the logo process. However, the present invention does not necessarily require both processes. Just by itself can be an invention.

(First Embodiment Processing of receiving apparatus when audio stream is switched)
First, processing when the audio stream of the first embodiment is switched will be described.

  Hereinafter, with reference to FIG. 1 to FIG. 9, a description will be given of processing of the receiving apparatus and the method when the audio stream is switched.

  FIG. 1 is a block diagram showing a configuration of a broadcast receiving apparatus 1 in advanced BS / advanced broadband CS broadcasting as a first embodiment. This broadcast receiving apparatus receives a broadcast wave reception signal obtained by a receiving antenna (not shown), and performs a demodulation process and an error correction decoding process in the transmission line demodulation / decoding unit 11 to obtain a TLV stream. The video stream and the audio stream are separated from the stream by the TLV / MMT separation unit 12.

  The TLV / MMT separation unit 12 separates a TLV (Type Length Value) packet and an MMT (MPEG Media Transport) packet from the audio stream and sends them to the audio selection control unit 13, respectively. The audio selection control unit 13 selects one asset that is suitable for the output destination AV amplifier 2 from a plurality of audio assets based on the TLV information of the TLV packet and the MMT information of the MMT packet. Output to each external output system.

  In the internal reproduction system, the decoder 14 decodes the selected audio asset, and if the decoded output is 5.1ch PCM data, the downmixer (DMIX) unit 15 converts it to 2ch PCM data and sends it to the switching unit 16. If it is 2ch PCM data, it is sent directly to the switching unit 16. Based on an instruction from the audio selection control unit 13, the switching unit 16 selects either the 2ch from the downmixer unit 15 or the 2ch directly supplied from the decoder 14 at the input, and at the output the internal reproduction system, the external Select one of the output systems.

  The 2-channel PCM data selected and output to the internal reproduction system by the switching unit 16 is converted to an analog audio signal by a DAC (Digital-Analog Converter) 17 and sent to the audio output unit 18 by an internal amplifier and a speaker for sound reproduction. Is done. The 2ch PCM data selected and output to the external output system is sent to the external output interface (I / F) 19. The external output interface 19 includes an HDMI output terminal, an S / PDIF optical digital audio output terminal, and an S / PDIF coaxial digital audio output terminal. The external AV amplifier 2 and HDMI cable, S / PDIF optical digital cable, S / P The audio asset that can be connected by the PDIF coaxial digital cable and is selected by the audio selection control unit 13 is output to the externally connected AV amplifier 2. If the corresponding audio mode information of the externally connected AV amplifier 2 is not obtained, 2ch PCM data from the switching unit 16 is selected and output to the AV amplifier 2.

  Here, in the external output interface 19, when the corresponding audio mode information is obtained when the AV amplifier 2 is connected, the information is sent to the audio selection control unit 13. When the corresponding audio mode information of the connected AV amplifier 2 is obtained from the external output interface 18, the audio selection control unit 13 registers the information, and when the audio asset of the corresponding audio mode arrives. , Set to switch to output the audio asset.

  On the other hand, the video stream obtained by the transmission path demodulation / decoding unit 11 is sent to the video processing unit 1A. The video processing unit 1A generates a video signal having a predetermined resolution from the input video stream, and sends it to the display device 3 for display. Here, when the corresponding audio mode of the connected AV amplifier 2 is not registered and set, the audio selection control unit 13 displays a display for prompting the GUI (Graphical User Interface) display unit 1B to input a mode selection. Send instructions to do. In response to the instruction, the GUI display unit 1B causes the display device 3 to display an input operation screen for mode selection through the video processing unit 1A. When the user views the screen and performs an operation of selecting the corresponding audio mode of the AV amplifier 2 on the operation input unit 1C, the corresponding audio mode of the connected AV amplifier 2 is registered and set in the audio selection control unit 13. be able to.

  FIG. 2 is a conceptual diagram for explaining a process of transmitting an audio asset by connecting an external AV amplifier 2 to the broadcast receiving apparatus 1. In FIG. 2, the connection between the receiving apparatus 1 and the external AV amplifier 2 is performed by any one of an HDMI cable, an S / PDIF optical digital cable, and an S / PDIF coaxial digital cable.

  First, when the receiving apparatus 1 is in the form of a set top box (STB), the HDMI output terminal of the receiving apparatus 1 and the HDMI input terminal of the external AV amplifier 2 are connected by an HDMI cable. Thereby, the audio signal is transmitted from the receiving apparatus 1 to the external AV amplifier 2 together with the video signal. On the other hand, when the receiving apparatus 1 is in the form of a television, the HDMI output terminal of the external AV amplifier 2 is connected to the receiving apparatus (television) 1 for the purpose of inputting video / audio signals reproduced by the external AV amplifier 2. An HDMI input terminal of the receiving device (television) 1 is connected by an HDMI cable. In this case, by using a function (HDMI-ARC: audio return channel) that transmits only the audio signal from the receiving device (TV) 1 to the external AV amplifier 2 on the HDMI cable, the sound of the receiving device (TV) is transmitted. The signal can be transmitted to the external AV amplifier 2. Note that the television receiver 1 may be provided with an HDMI output terminal and may have a function of transmitting a video / audio signal to the HDMI input terminal of the external AV amplifier 2.

  In the case of connection using an S / PDIF optical digital cable or an S / PDIF coaxial digital cable, the digital audio output terminal of the receiving apparatus 1 and the optical or coaxial digital audio input terminal of the external AV amplifier 2 are connected.

  Here, in any connection of HDMI, HDMI-ARC, and S / PDIF, the audio output from the receiving apparatus 1 to the external AV amplifier 2 is only one audio asset. When receiving a broadcast including a plurality of audio assets, the receiving apparatus 1 selects and outputs one audio asset to be output to the external AV amplifier 2.

  Hereinafter, connection with the external AV amplifier 2 and processing required in the receiving apparatus 1 will be described.

As illustrated in FIG. 2, the reception device 1 receives a broadcast wave (TLV stream) including a plurality of audio streams (maximum audio asset number 4). For example, in advanced broadband CS broadcasting, seven types of audio modes can be operated (in advanced BS digital broadcasting, AAC 1.0ch operation is not performed, so six types). Among these, when broadcasting audio modes other than the three AAC 1.0ch (not used in advanced BS), AAC 2.0ch, and AAC 5.1ch, which are mandatory for the receiving device 1 to reproduce independently, Audio is broadcast simultaneously. Table 1 shows a combination example of a sound mode and simul sound in broadcasting.

  The receiving apparatus 1 selects one asset to be output from the plurality of audio assets and outputs the selected asset to the external AV amplifier 2. An asset to be output may be arbitrarily selected by the user, or may be automatically selected when the audio mode that can be supported by the external AV amplifier 2 is known (set in advance on the receiving device 1 side). In this case, the asset with a small component tag value is given priority as in the case of playback on the receiving device 1 main body. Further, a function may be provided in which the audio stream is decoded in the receiving apparatus 1 and output to the external AV amplifier 2 by linear PCM.

  The audio mode output to the outside is a combination according to the corresponding status of the output destination device.

  The audio mode and switching operation in stream output will be described.

First, the stream output system to S / PDIF and HDMI is defined by IEC60958 and IEC61937. When outputting each audio mode operated in the advanced BS broadcast / advanced broadband CS broadcast, each audio mode is output in accordance with the provisions of Table 2.

  When AAC 22.2ch and ALS audio is transmitted, the bit rate of the signal exceeds the range that can be transmitted at the IEC60958 frame rate of 48 kHz, so it is necessary to extend the frame rate to double speed or higher. Currently, the revision of the standards of IEC60958 and IEC61937 corresponding to this is under preparation.

  As an example of operation when a broadcast whose audio mode changes is output to the external AV amplifier 2, the receiving apparatus 1 and the external AV amplifier 2 when a broadcast whose audio mode changes from MPEG4-AAC 2ch to MPEG4-ALS 2ch are received. The operation of is shown in FIG.

  The receiving apparatus 1 receives the AAC 2ch asset, which is the preceding voice (FIG. 3A), and outputs it to the S / PDIF at a frame rate of 48 kHz (FIG. 3B). The external AV amplifier 2 receives this stream, decodes it, and outputs it to the speaker (FIG. 3 (c)). When the preceding audio asset of broadcasting stops in this state (FIG. 3 (a)), the receiving apparatus 1 outputs a NULL data stream to S / PDIF for 50 msec or more in accordance with IEC60958-1 (FIG. 3 (b)). / Stops output to PDIF. With this null data stream, the external AV amplifier 2 discharges the audio stream accumulated in the buffer.

  When the receiving apparatus 1 receives an ALS 2ch asset as subsequent audio (FIG. 3A), the receiving apparatus 1 changes the S / PDIF frame rate to 96 kHz and outputs an ALS 2ch stream (FIG. 3 ( b)). The external AV amplifier 2 that has received such a stream changing on the S / PDIF performs resynchronization processing by a PLL circuit in response to a change in frame rate. After that, the audio stream format is detected, the audio decoder is switched from AAC to ALS, and the subsequent audio is output from the speaker after the delay time of ALS decoding (FIG. 3C).

  Further, FIGS. 4 and 5 show the change of the audio mode in the broadcast signal when the stream whose audio mode is changed in the middle in the advanced BS / advanced broadband CS digital broadcasting, and the S / PDIF from the receiver 1. The relationship between the signal to be output to and the audio data output from the AV amplifier 2 is shown.

  FIG. 4 shows the relationship when the audio mode is changed from MPEG4-AAC 2ch to MPEG4-AAC 5.1ch. Receiving device 1 that has received AAC 2ch from the broadcast signal outputs an AAC 2ch audio stream to S / PDIF with a transmission clock of 48 kHz (single speed). In broadcasting, an MPT for notifying the change of the voice mode is sent about 100 msec before the voice mode changes.

  When the receiving apparatus 1 sees the contents of the MPT and finds that the sound changes from AAC 2ch to 5.1ch, it stops outputting the audio stream to the S / PDIF. However, since it is known that the subsequent audio is 5.1ch and can be transmitted with the same 48 kHz transmission clock, the transmission clock continues to be output. Thereafter, when a subsequent AAC 5.1ch audio stream is received, the stream is output to S / PDIF.

  The AV amplifier 2 that has received such a signal from the S / PDIF outputs AAC 2ch sound to the speaker while the AAC 2ch sound is being input, and stops sound output when entering the no-sound section. Next, when an audio signal is input, processing for detecting what the audio is is performed, and when it is determined that AAC is 5.1ch, output is performed to a speaker.

  On the other hand, FIG. 5 shows a case where the audio mode is changed from MPEG4-AAC 2ch to MPEG4-AAC 22.2ch. The difference from the case of FIG. 4 is that MPEG4-AAC 22.2ch cannot be transmitted at a bit rate when the S / PDIF transmission clock is 48 kHz, and it is necessary to switch the transmission clock to 96 kHz (double speed). .

  Receiving device 1 that has grasped the change of the audio mode by updating the MPT, if it knows that the subsequent audio is MPEG4-AAC 22.2ch that needs to be transmitted at 96kHz, it stops the S / PDIF AAC 2ch audio output. Thereafter, the output of the 48 kHz transmission clock is also stopped. Thereafter, data without sound of a 96 kHz transmission clock is output to S / PDIF, and when a 22.2ch audio stream is received, the sound is output to S / PDIF.

  The AV amplifier 2 that has received such a signal from the S / PDIF receives the 96 kHz transmission clock signal after the AAC 2ch 48 kHz signal is cut off, and then synchronizes with the receiving apparatus 1 at a frequency of 96 kHz by the PLL. I do. After the time required for this synchronization (about 200 msec) has elapsed, an audio signal is received, and after confirming that AAC is 22.2 ch, sound is output to the speaker. When the sound mode changes with different transmission clocks occur in this way, there is a problem that the time required for sound output becomes long. As shown in FIG. 3, since the audio mode switching from MPEG4-AAC 2ch to MPEG4-ALS is also a switching with a different transmission clock frequency, the same problem occurs.

As described in the problem, the audio mode is extended in advanced BS broadcasting. As a result, there exist voice modes that cannot be transmitted due to insufficient transmission rate at the transmission clock frequency defined in the conventional S / PDIF standard. For this reason, the S / PDIF standard revision work is being carried out to expand the S / PDIF standard and enable high-speed transmission. Table 3 shows the relationship between the audio mode and the transmission clock frequency in S / PDIF.

  Advanced BS broadcast compatible AV amplifier (including devices such as sound bars) 2 does not need to receive and output all audio modes defined in the standard as shown in Table 3, AAC 1ch / 2ch It is possible to commercialize products that only support /5.1ch. In this case, the S / PDIF transmission clock frequency only needs to correspond to 48 kHz.

  On the other hand, when the AV amplifier 2 corresponds to MPEG4-AAC 22.2ch, the S / PDIF transmission clock frequency corresponds to both 48 kHz and 96 kHz. When the AV amplifier 2 supports up to MPEG4-ALS 5.1ch, it is necessary to further support a transmission clock frequency of 384 kHz.

In order to convey these distinctions to general consumers in an easy-to-understand manner, this embodiment classifies AV amplifier products into three profiles as shown in Table 4.

  On the other hand, the broadcasting station switches and transmits the audio mode of the audio stream during broadcasting. For example, the main program is transmitted in MPEG4-AAC 5.1ch, and the CM part is transmitted in MPEG4-AAC 2ch.

  In advanced BS broadcasting, when such an audio stream is switched, the MPT is updated 100 msec before the switching, and the reception apparatus 1 is notified in advance that the audio stream is switched.

  When the receiving device (TV) 1 that has received such a broadcast outputs a sound with the built-in speaker, the receiving device (TV) 1 first outputs the preceding-side sound when grasping in advance the switching of the sound mode by updating the MPT. To perform switching operation, change the decoder mode to match the audio mode with the subsequent audio stream, and output the subsequent audio to the speaker when the subsequent audio is received.

  On the other hand, when an audio stream is output from the receiving device (TV) 1 to the AV amplifier 2 and output to the speaker via the AV amplifier 2, the receiving device (TV) 1 starts with the preceding audio (TV) as shown in FIG. MPEG4-AAC 2ch) is output to S / PDIF. When the switching of the voice mode is detected by the MPT update, the output of the preceding voice to the S / PDIF is stopped. However, the S / PDIF transmission clock is kept at 48 kHz. When the subsequent audio (MPEG4-AAC 5.1ch) is received, the receiving apparatus (TV) 1 outputs the subsequent audio stream to the S / PDIF.

  Here, the S / PDIF has no means for transmitting information other than the audio stream from the receiving device (TV) 1 to the AV amplifier 2. Therefore, the AV amplifier 2 confirms the content of the received audio stream each time the audio mode is switched, and detects a change from AAC 2ch to AAC 5.1ch. For this reason, the subsequent sound is output from the speaker with a delay of a certain time from the point where the stream on the S / PDIF is changed to AAC 5.1ch. This time is a time for the AV amplifier 2 to detect the audio mode switching.

  In the above example, the change from MPEG4-AAC 2ch to MPEG4-AAC 5.1ch is described in the case where the change is made within the range of the audio mode that can be transmitted at the S / PDIF transmission clock frequency of 48 kHz. . FIG. 5 shows audio mode switching that requires switching from MPEG4-AAC 2ch to MPEG4-AAC 22.2ch to different transmission clock frequencies.

  Receiving device (TV) 1 that has received MPEG4-AAC 2ch audio, which is the preceding audio, transmits an AAC 2ch stream at a transmission clock frequency of 48 kHz when outputting the audio stream to S / PDIF. Receiving device (TV) 1 that recognizes that the subsequent audio is MPEG4-AAC 22.2ch by updating MPT, first stops the transmission of the preceding audio. Next, since the succeeding sound is a sound mode that cannot be transmitted unless it is a 96 kHz clock, the 48 kHz transmission clock is also stopped, and then the 96 kHz transmission clock is output. Thereafter, when subsequent audio is received, an MPEG4-AAC 22.2ch audio stream is transmitted with a clock of 96 kHz.

  On the other hand, from the viewpoint of the AV amplifier 2 that receives this audio stream, the audio stream is first stopped while the MPEG4-AAC 2ch 48 kHz audio as the preceding audio is being output, and then the 48 kHz transmission clock is also stopped. Subsequently, a 96 kHz transmission clock is input via S / PDIF. Since the frequency of the transmission clock for communication has changed, the PLL circuit synchronizes the transmission clock of the receiving device (TV) 1 and the AV amplifier 2.

  When the communication path between the receiving apparatus (TV) 1 and the AV amplifier 2 is synchronized, the audio stream can be received again via S / PDIF, and the audio mode of the received audio stream is detected and sent to the speaker. The operation of making a sound is performed. It is assumed that the time required for the synchronization processing by the PLL (PLL lock time) takes a relatively long time of about 200 msec. Therefore, there is a problem that the head part of the subsequent voice is missing.

  In order to avoid this problem, the receiving device (TV) 1 belongs to which transmission clock frequency the AV amplifier 2 connected to the receiving device (TV) 1 can handle, that is, to which profile in Table 4 Whether the AV amplifier is connected is stored as a profile connection mode.

  When an HDMI cable is used for the connection between the receiving device (TV) 1 and the AV amplifier 2, the HDMI EDID (Extended Display Identificaiton Data) or HDMI-CEC (High Definition Multimedia Interface-Consumer Electronics Control) Based on the information that can be acquired, the receiving apparatus (TV) 1 determines which profile the AV amplifier 2 belongs to, and stores the connection mode of the profile. For example, when an AV amplifier capable of supporting only MPEG2-AAC 2ch / 5.1ch is connected, the receiving apparatus (TV) 1 stores and sets “Profile-A connection mode”. When an AV amplifier capable of supporting MPEG2-AAC 2ch / 5.1ch / 22.2ch is connected, the receiving device (TV) 1 stores and sets “Profile-B connection mode”.

  On the other hand, when the connection between the receiving apparatus (TV) 1 and the AV amplifier 2 is an S / PDIF optical cable or a coaxial cable, the receiving apparatus (TV) 1 cannot acquire information regarding the AV amplifier 2. For this reason, a menu for inputting the “profile of the connected AV amplifier” is created on the GUI of the receiving apparatus (TV) 1 and the user inputs it.

  The reception device (TV) 1 has a function of storing and setting a “profile connection mode” indicating which profile the AV amplifier 2 connected to the reception device (TV) 1 belongs to. The audio stream output from S to P / PDIF is as shown in FIGS. 6 and 7 show signals output from the receiving device (TV) 1 for each mode to the S / PDIF when a broadcast in which the audio stream changes from MPEG4-AAC 2ch to MPEG4-AAC 22.2ch is received. FIG.

  FIG. 6 is a diagram when a Profile-B AV amplifier capable of handling AAC 22.2ch is connected. When the receiver (TV) 1 set to the “Profile-B connection mode” outputs MPEG4-AAC 2ch audio to S / PDIF, even if it is originally an AAC 2ch stream in time at 48 kHz, it is intentionally 96 kHz To output to S / PDIF. After that, even if the audio is switched to MPEG4-AAC 22.2ch, only the audio stream can be switched with the transmission clock being 96 kHz. As a result, the PLL lock time as shown in FIG. 5 is not required, and it is possible to reduce the lack of sound at the switching point from AAC 2ch to 22.2ch.

  On the other hand, FIG. 7 is a diagram when a Profile-A AV amplifier that cannot handle MPEG4-AAC 22.2ch is connected. When the receiver (TV) 1 set to "Profile-A connection mode" outputs MPEG4-AAC 2ch audio to S / PDIF, it cannot be used with a clock other than 48kHz in the first place. Since it is an output, the S / PDIF transmission clock is set to 48 kHz and output.

  In the case of advanced BS broadcasting, the MPEG-4 AAC 1ch / 2ch / 5.1ch is the only audio decoder that must be provided by the receiving apparatus, and the rest is optional. For this reason, when AAC 22.2ch or MPEG4-ALS audio is broadcast, AAC 2ch or 5.1ch audio is always broadcast as simulcast.

  Profile-A AV amplifier cannot handle AAC 22.2ch audio. For this reason, the receiving device (TV) 1 that has grasped that the audio switching to MPEG4-AAC 22.2ch occurs due to the MPT update, receives the AAC 2ch or 5.1ch simulcast audio that can be handled by the Profile-A AV amplifier. Search from the broadcast signal and output the sound to the S / PDIF with the transmission clock of 48 kHz. In this case, the AV amplifier 2 receives a stream in which the mode does not change with MPEG4-AAC 2ch for both the preceding audio and the subsequent audio, so that it is possible to output the subsequent audio without requiring the audio mode detection time.

  As described above, when the connection between the receiving device (TV) 1 and the AV amplifier 2 is an S / PDIF optical cable or a coaxial cable, the receiving device (TV) 1 selects a sound mode that can be received by the AV amplifier 2 in advance. Although it is not possible to automatically grasp, the user can register the “Profile-A connection mode” in advance using the GUI, and output a stream that can be played back to the AV amplifier 2 without fail. Can do.

  MPEG4-AAC 22.2ch in this embodiment can be read as MPEG4-ALS 2ch. When handling MPEG4-ALS 5.1ch, a third profile and mode called Profile-C will be added.

  The above control processing is performed by the voice selection control unit 13 shown in FIG. Specific processing procedures in the voice selection control unit 13 are shown in FIGS.

  FIG. 8 is a flowchart showing the procedure of the voice mode registration setting process. First, it is determined whether or not the external AV amplifier 2 is connected by an HDMI cable (step S1). If the connection is not HDMI (NO), the user can select the profiles A to C by the GUI display (step S2). (Step S3), and the selected profile is registered and set (step S4).

  In step S1, in the case of HDMI connection (YES), it is determined whether EDID can be obtained through the HDMI cable (step S5). If EDID is available (YES), EDID is obtained (step S6). Then, the physical address of the device is identified from the obtained EDID to determine a compatible profile (step S7), and the process proceeds to step S4 to register and set the profile.

  If the EDID cannot be obtained in step S5 (NO), an HDMI-CEC command is obtained (step S8), and a profile that can be supported is determined from the HDMI-CEC command (step S9). Migrate and register the profile.

  FIG. 9 is a flowchart showing a procedure of processing after the audio mode registration setting at the time of S / PDIF connection as an example. First, when MPT is detected during reception of an audio stream (steps S11 and S12), the registered profile of the AV amplifier 2 is determined (step S13). If the profile connection mode is A, the clock speed is set to 48 kHz (step S14). If B, the clock speed is set to 96 kHz (step S15), and if C, the clock speed is set to 384 kHz (step S16).

  Here, it is determined whether or not the double speed mode (96 kHz, 384 kHz) is selected in the clock setting (step S 17). If it is not the double speed mode, the sound mode is converted to the single speed 48 kHz audio mode (step S 18). Are output to the S / PDIF in the corresponding audio mode (step S19).

  As described above, in the broadcast receiving apparatus according to the first embodiment, in the processing of the receiving apparatus when the audio stream is switched, when the non-double speed mode and the double speed mode are mixedly broadcast, the connected apparatus When the audio device does not support the sound mode of the profile of the double speed mode, it can be converted into the sound of the non-double speed mode and output when switching to the sound of the double speed mode.

  In addition, when the connected audio device also supports double speed mode, the audio mode of the corresponding profile is grasped in advance and the clock is not changed before and after the audio mode switching. The head loss of the output sound can be extremely reduced.

  Even when the audio mode support status in the AV amplifier cannot be grasped in advance, the user can select the audio to be output by designating and inputting the mode using the GUI.

  Next, the part regarding the logo processing of the first embodiment will be described.

  It should be noted that in the logo processing in the transmission device, reception device, and transmission / reception device according to the first embodiment, description is first made using CDT based on MPEG-2 TS adopted in the current terrestrial broadcasting and the like for easy understanding. To do.

  In the case of application to MH-CDT based on TLV (Type Length Value) / MMT (MPEG Media Transport), which is expected to be adopted in future advanced BS, which is compatible with FIG. 1, the logo of the first embodiment This will be described later in the processing.

(Logo processing in the first embodiment)
Hereinafter, a transmission device, a reception device, a transmission / reception device, and a method related to logo processing will be described with reference to FIGS.

  FIG. 10 is a block diagram showing the configuration of the transmission apparatus of the digital television broadcast system according to this embodiment. This transmission device inputs, for example, logo data used in a program display field such as EPG (Electronic Program Guide) and logo management information for managing the logo of the logo data. After the sectioning unit 102, the logo data distribution descriptor generating unit 103, the logo transmission descriptor generating unit 104, and the SDT (Service Definition Table) sectioning unit 105, the multiplexing unit 106 performs video signal and audio signal, It is multiplexed as MPEG-2 TS (Transport Stream) (hereinafter TS) together with PSI (Program Specific Information), SI (Service Information) other than CDT and SDT, etc., and transmission path coding such as error correction coding and modulation is performed. After being applied by the transmission path encoding / modulating unit 107, it is transmitted to the service area as a broadcast signal.

  In the present invention, the transmission channel coding / modulation unit 107 is provided after multiplexing processing as a configuration example of a transmission apparatus in general digital broadcasting. However, in the case of IPTV, the modulation unit is not necessary, and the transmission channel code is not necessary. Also, the transmission path coding may be performed as necessary for IP transmission.

  Here, in the transmission system of service logo data for digital television broadcasting, based on the provisions of 5.4.1.2 of ARIB TR-B14, a section type table called CDT (Common Data Table) is used, and the logo type ( Logo management information indicating the correspondence between the “logo_type” and the section to be transmitted is defined as a new descriptor and transmitted together with the logo data.

  Usually, a logo used in broadcasting differs for each broadcasting channel (service). For this reason, each logo data is given a logo identification (hereinafter, logo_id) for identification and management by the receiver. In addition, the same logo_id is assigned to multiple types of logo data that have the same design and color, and differ in the number of pixels depending on the assumed receiver, its application, audio mode, etc. Differentiated by logo type (hereinafter logo_type). In addition, the logo_id is managed by updating with a version number (hereinafter, logo_version).

  The transmitted logo data is sent to the logo data module unit 101 together with logo_id, logo_type, and logo_version which are logo management information. This logo data modularization unit 101 compresses the input logo data and has the data structure defined in FIG. 11 (quoted from Table 5-15 of 5.4.1.2 of ARIB TR-B14 5.9 version) for each logo_id and logo_type. Store it in an area called the logo data module. In this logo data module, the data_size field is 16 bits, but 64 kbytes of data cannot be stored in the CDT section.

  Each information of FIG. 11 is defined as follows in Table 5-15 of 5.4.1.2 of ARIB TR-B14 5.9 edition.

“Logo_type (logotype): Indicates the logo type. For logo_type, see Table 4-1. This value matches the section_number value of CDT and is transmitted.

  logo_id (logo identification): A value for identifying logo data in the receiver, unique to each network_id.

  logo_version (logo version number): Enter the version number of the logo_id. This value matches the value of logo_version described in the logo transmission descriptor described in SDT.

  data_size (logo data size): indicates the number of bytes of the subsequent logo data. In some cases, 0 is written because the logo indicated by logo_id is no longer used.

data_byte (logo data): Data body of logo data. ”
The logo data module storing the compressed input logo data is sent from the logo data module forming unit 101 to the CDT sectioning unit 102. The CDT sectioning unit 102 distributes the logo data module to a plurality of sections of the CDT and transmits them to the multiplexing unit 106. Here, the CDT has a data structure as shown in FIG. 12 (quoted from Table 5-14 of 5.4.1.2 of ARIB TR-B14). The CDT is identified for each download data identification (hereinafter, download_data_id). One section of the CDT has a maximum size of 4 kbytes indicated by the section_length field, and the CDT can be divided into a maximum of 256 sections and transmitted.

  Each information of FIG. 12 is defined as follows in Table 5-14 of 5.4.1.2 of ARIB TR-B14 5.9 edition.

“Table_id (table identification): Enter 0xC8.

  section_syntax_indicator (section syntax instruction): 1 is described.

  section_length (section length): Specifies the number of bytes of a section from immediately after the section length field to the end of the section including the CRC. The maximum section length of CDT is 4096 bytes and this value should not exceed 4093.

  download_data_id (identification of download data): Used to specify the download data being transmitted. The download data identification is unique for each original network identification (original_network_id). In the case of a service logo, this value matches the value of download_data_id described in the logo transmission descriptor described in SDT.

  version_number (version number): The version number of the sub-table is incremented by 1 every time the content changes, and then returns to 0 after 31.

  current_next_indicator (current next instruction): 1 is described.

  section_number (section number): A section number is described, and there is a section that is assigned from 0 to the number indicated by last_section_number without omission. In the case of service logo data transmission, the logo of each size is transmitted in the section_number section that matches the logo_type value.

  last_section_number (last section number): represents the last section number to which the section belongs.

  original_network_id (original network identification): Describes the network ID of the transmission source of data being transmitted.

  data_type (data type): indicates the type of data being transmitted. In digital terrestrial television broadcasting, only the CDT transmission system service logo will be used for the time being.

  descriptors_loop_length (descriptor length): Describe the data length of the descriptor loop immediately after. If there is no data in the descriptor loop, write 0.

data_module_byte () (data module byte): Download data is described in a syntax defined for each data_type. ”
The logo management information logo_id, logo_type, and logo_version are also sent to the logo data distribution descriptor generation unit 103 and the logo transmission descriptor generation unit 104. The logo data distribution descriptor generation unit 103 generates, for each logo data, a logo data distribution descriptor indicating the correspondence between the logo_type and the distributed CDT section, and sends the generated logo data distribution descriptor to the CDT sectioning unit 102. To place. In addition, the logo transmission descriptor generation unit 104 sets 0x01 when the CDT transmission method 1 is specified separately for the logo transmission type (logo_transmission_type), and logo data for logo identification (logo_id) and logo version number (logo_version). Along with the management information, a download data identification (download_data_id) is given to generate a logo transmission descriptor. Here, download_data_id is set to the same value as CDT download_data_id, so that it is possible to specify logo data for CDT transmission corresponding to a certain broadcast channel (service). The SDT sectioning unit 105 arranges the logo transmission descriptor for each service_id specifying the broadcast channel in the SDT descriptor area and transmits it to the multiplexing unit 106, and TS-multiplexes it together with the CDT section data.

  When the size of data for each logo_type stored in the logo data module is within the size of 4 kbytes per section, transmission can be performed using one section. However, when logo data with a large number of pixels is transmitted, for example, in 4K and 8K broadcasting, there is a possibility that it exceeds 4 kbytes. Also, in ultra high-definition digital broadcasting, if you do not use the logo_type that was used in terrestrial digital broadcasting but select only a certain type of logo and transmit it in any order Is also possible. For these reasons, “the logo of each size is transmitted as it is in the section_number section that matches the“ logo_type ”value as determined in the operation regulations of digital terrestrial broadcasting. Cannot be used. Therefore, in this embodiment, the logo data distribution descriptor is defined so that the CDT can be transmitted even in such a case. The data structure of the logo data distribution descriptor is as shown in FIG. 13, for example.

  The logo data module identified by logo_type is divided into CDT sections with consecutive section numbers and transmitted. The first section number is described in the start_section_number field, and the number of section divisions for transmitting the logo data module is indicated. Enter in the numbers_of_sections field. For example, two types of logo_type logo data are transmitted, logo_type = 0x05 1000 bytes logo data is section number 0, logo_type of 10000 bytes logo data is 0x06, and 4000 bytes, 4000 bytes, 2000 bytes total 3 sections. The data is divided and transmitted sequentially from section number 1.

in this case,
logo_type = 0x05, start_section_number = 0x00, numbers_of_sections = 0x01
logo_type = 0x06, start_section_number = 0x01, numbers_of_sections = 0x03
May be described.

  The logo data distribution descriptor is transmitted in the CDT descriptor area. The series of logo data transmission system is as shown in FIG.

  On the other hand, if the corresponding broadcast receiving apparatus detects that the logo transmission descriptor is arranged in the descriptor area of the SDT for the logo data of the desired broadcast channel (service), the CDT of the service is determined. First, an arbitrary CDT section is acquired with reference to the specified download_data_id. As described above, by analyzing the logo data distribution descriptor described in the acquired CDT section, it is possible to grasp which logo_type logo data is transmitted in which section (group) of which section number. Then, by setting so as to filter the section number of the next required logo_type, it is possible to efficiently acquire the logo data.

  Next, the configuration of the broadcast receiving apparatus will be described. FIG. 14 is a block diagram illustrating a configuration of the broadcast receiving device 1a according to the first embodiment. As shown in FIG. 14, the broadcast receiving apparatus 1a includes a transmission path demodulation / decoding unit 201, a module I / F unit 202, a section processing unit 203, a TS processing unit 204, a video decoding unit 205, an audio decoding unit 206, and an OSD process. Unit 207 (OSD: On-Screen Display), communication I / F unit 208, operation unit 209, NVRAM 210 (NVRAM: Non-Volatile RAM), ROM 211 (ROM: Read Only Memory), RAM 212 (RAM: Random Access Memory), A CPU 213 (CPU: Central Processing Unit), a descrambler 214, and a storage unit 215 are provided, and each unit is connected by a bus 216.

  The transmission path demodulation / decoding unit 201 performs demodulation processing and error correction decoding processing on a broadcast signal received from a receiving antenna (not shown) to obtain a transport stream TS. The TS processing unit 204 performs processing for separating information multiplexed as a transport stream TS and extracting a video signal, an audio signal, and the like. Also, the section processing unit 203 extracts section-related information such as PSI (Program Specific Information) and SI (Service Information) demultiplexed from the transport stream TS in cooperation with the TS processing unit 204, and also CDT. Perform the process. For example, by setting a filtering condition, it is possible to extract only a section having a specific section number from EIT or CDT that is generally composed of a plurality of sections.

  The video decoding unit 205 decodes the video signal output from the TS processing unit 204 and outputs the decoded video signal to the OSD processing unit 207. The audio processing unit 206 corresponds to the audio selection control unit 13, the decoder 14, the DMIX unit 15, the switching unit 16, the DAC 17, the audio output unit 18, the external output interface 19, and the GUI display unit 1B illustrated in FIG. The audio signal (audio stream) output from the TS processing unit 204 is decoded, and the decoded audio signal is output to the audio output unit 18 inside the receiving apparatus or output to the external AV amplifier 2. The AV amplifier 2 is an acoustic device including an amplifier, a speaker, and the like, and performs audio reproduction according to the audio signal output from the audio processing unit 206. The OSD processing unit 207 performs predetermined OSD processing, for example, GUI display processing from the audio processing unit 206, on the video signal output from the video decoding unit 205 under the control of the CPU 213, and outputs it to the display device 3. The display device 3 is an LCD (Liquid Crystal Display) or the like, and performs screen display based on the output video signal. For example, the display device 3 performs screen display such as EPG based on the SDT described in the broadcast channel information or the EIT described in the program information included in the SI separated from the multiplexed transport stream TS1.

  The communication I / F unit 208 is an interface that performs data communication with the communication network 4 using a predetermined communication protocol under the control of the CPU 213. The operation unit 209 is an operation key, a remote controller, or the like, and receives a user operation input. The operation unit 209 also has the function of the operation input unit 1C illustrated in FIG. The NVRAM 210 stores various setting information. For example, the NVRAM 210 stores the format of content that can be handled by the broadcast receiving apparatus 2 as setting information.

  The ROM 211 stores a program executed by the CPU 213 and the like. The RAM 212 provides a work area when the CPU 213 executes the program. The RAM 212 also provides an area for temporarily storing EIT information included in the SI separated from the multiplexed transport stream TS1. The CPU 213 centrally controls the operation of the broadcast receiving device 1a by developing the program stored in the ROM 211 in the work area of the RAM 212 and sequentially executing the program.

  The module I / F unit 202 is an interface connected to the security module 220 in which encryption key information related to limited reception is stored.

  Based on the encryption key information stored in the security module 220, the descrambler 214 descrambles the payload portion scrambled in the received transport stream TS1. By descrambling by the descrambler 214, the broadcast receiving apparatus 2 supports limited reception using EMM or ECM. The storage unit 215 is a large-capacity storage medium such as an HDD (hard disk drive), and stores received content, for example.

  Next, the processing operation regarding the logo data of the receiving apparatus executed under the control of the CPU 213 will be described with reference to the flowchart shown in FIG.

  First, when a broadcast signal is received (step S21), the broadcast signal is demodulated to obtain an SDT (step S22). Here, for logo data of a desired broadcast channel (service), the presence or absence of a logo transmission descriptor is repeatedly determined from the acquired SDT (step S23), and if the logo transmission descriptor is described in the SDT (YES). Then, it is determined from the logo transmission descriptor whether or not there is an unreceived logo (step S24). Based on the determination result of step S24, the CDT section of any section_number of the specified service is acquired (step S25), and the logo data distribution descriptor is extracted from the acquired CDT section and analyzed (step S26). Based on the analysis result, the CDT section of the section_number for the desired logo_type of the specified service is acquired (step S27), the logo data is acquired from the acquired CDT section (step S28), and the series of processing ends.

  That is, according to the above processing procedure, it is possible to grasp which logo data of which logo_type is transmitted in which section (group) of which section number, so it is set to filter the necessary section number of logo_type next. By doing so, the logo data can be acquired efficiently.

  As described above, in the logo processing in the transmission device, the reception device, and the transmission / reception device according to the first embodiment, the correspondence between the logo type and the transmission section in the logo data transmission in the section format Since the logo data distribution descriptor indicating the relationship is specified and transmitted, it is not dependent on the size of the logo data, and the required number of logo data of the required type can be selected and efficiently in any order. Can be transmitted.

  The logo processing in the transmission device, the reception device, and the transmission / reception device according to the first embodiment has been described using the CDT based on the MPEG-2 TS employed in the current terrestrial broadcasting. The present invention may be applied to MH-CDT based on TLV (Type Length Value) / MMT (MPEG Media Transport), which is assumed to be adopted in advanced BS / advanced broadband CS broadcasting and the like. When applied to MH-CDT based on TLV (Type Length Value) / MMT (MPEG Media Transport), it is the same as the broadcasting system of TLV (Type Length Value) / MMT (MPEG Media Transport) in FIG. It is possible to implement a combination of both processing when the audio stream is switched and (2) logo processing without any problem.

  However, in the case of TLV (Type Length Value) / MMT (MPEG Media Transport), there are the following differences in blocks and processing as compared with MPEG-2 TS. “MH-” has the same function as the table and descriptor specified in ARIB STD-B10 in “Reference 1 Configuration of control information described in this standard” in ARIB STD-B60. However, a table identifier or descriptor tag value that has been modified to be used in a broadcasting system that uses MMT is added to the name of the original table and descriptor by adding “MH-” meaning MPEG-H to the beginning of the name. Distinguish. Is explained.

  The MH-CDT section of TLV / MMT corresponds to the CDT section of MPEG-2 TS, the MH-SDT section of TLV / MMT corresponds to the SDT section of MPEG-2 TS, and the MH-logo transmission descriptor of TLV / MMT. Corresponds to the MPEG-2 TS logo transmission descriptor.

  The data structure of the MH-CDT is described in ARIB STD-B60 7.3.3.10. In this case, for example, even if the number of bits of the tag field (descriptor_tag) of the logo data distribution descriptor in FIG. 11 is 16 bits, the essence is not changed at all.

(Second Embodiment)
The second embodiment is based on the first embodiment, and only differences from the first embodiment will be described.

(Second Embodiment Processing of Receiving Device when Audio Stream is Switched)
The processing of the receiving device when the audio stream is switched is the same as in the first embodiment.

(Logo processing in the second embodiment)
Hereinafter, a transmission apparatus in the case of the above TLV / MMT will be described as a second embodiment.

  FIG. 16 shows the configuration, and logo data and logo management information for managing the logo of the logo data are input, and the logo data module forming unit 21, the MH-CDT sectioning unit 22, and the MH-logo transmission, respectively. After passing through the descriptor generation unit 23 and the MH-SDT sectioning unit 24, the MMT multiplexing unit 25 multiplexes with the video signal, the audio signal, and the like to transmit error correction coding, which is transmission channel coding, and the like to the transmission path. After being applied by the encoder / modulator 26, it is transmitted to the service area as a broadcast signal.

  Specifically, the transmitted logo data is sent to the logo data module 21 along with logo management information (logo identification (logo_id), logo type (logo_type), logo version number (logo_version)). The logo data modularization unit 21 converts the input logo data into logo data modules for each logo_id and logo_type. This modularized logo data module is sent to the MH-CDT sectioning unit 22 by the logo data module forming unit 21.

  The MH-CDT sectioning unit 22 distributes the logo data module input from the logo data module forming unit 21 to a plurality of sections of the MH-CDT, and transmits the plurality of sections to the MMT multiplexing unit 25. The MH-CDT sectioning unit 22 transmits the logo data module input from the logo data module forming unit 21 to the MMT multiplexing unit 25 without distributing the logo data module in one section of the MH-CDT. To do. Here, the MH-CDT is identified for each download_data_id.

  Further, the MH-CDT sectioning unit 22 displays logo data indicating the correspondence between the logo type and the section to be distributed (corresponding to which section (logo_type) the logo is distributed to which section). The distribution information (extended portion in FIG. 17) is sent to the MH-logo transmission descriptor generator 23.

  The logo management information (logo identification (logo_id), logotype (logo_type), logo version number (logo_version)) is also sent to the MH-logo transmission descriptor generation unit 23.

  This MH-logo transmission descriptor generator 23 sets 0x01 separately when the CDT transmission method 1 is specified as the logo transmission type (logo_transmission_type), and the logo identification (logo_id) and logo version number in the logo management information. Along with (logo_version), a download data identification (download_data_id) is added to generate a logo transmission descriptor shown in FIG. The download data identification (download_data_id) assigned by the MH-logo transmission descriptor generation unit 23 is the same id as the download data identification (download_data_id) assigned by the MH-CDT sectioning unit 22. Here, the download_data_id (16 bits) in FIG. 17 is set to the same value as the download_data_id (16 bits) of the MH-CDT shown in FIG. 12, so that the MH-CDT transmission corresponding to a certain broadcast channel (service) is set. It becomes possible to specify logo data. Here, the MH-logo transmission descriptor generation unit 23 receives the logo data distribution information from the MH-CDT sectioning unit 22, and expands the contents of the logo data distribution information in the MH-logo transmission descriptor shown in FIG. To do.

  The MH-SDT (Service Definition Table) sectioning unit 24 sets the MH-logo transmission descriptor in the descriptor area of the MH-SDT (Service Definition Table) for each service_id that identifies the broadcast channel. Arranged and transmitted to the MMT multiplexer 25 and multiplexed together with the MH-CDT section data.

  The essential difference from the configuration of the first embodiment shown in FIG. 10 is that the logo data distribution information is newly defined as a descriptor and described in the descriptor area in the MH-CDT. MH-logo transmission descriptor (Table 7-79 MH-logo transmission descriptor in 7.2.3.34 of ARIB STD-B60 1.4 version) is to be described. This expansion is shown in FIG.

  The first section number is described in the start_section_number field, and the number of section divisions for transmitting the logo data module is described in the numbers_of_sections field.

  FIG. 17 is an extension of ARIB STD-B60 1.4 version 7.4.13.34 Table 7-79 MH-logo transmission descriptor, and the extended part is the part enclosed by the line in FIG.

  Information on the expanded part of FIG. 17 is as follows.

  logo_type: Represents the logo type.

  start_section_number: Describes the first section number for transmitting logo data identified by logo_type.

  numbers_of_sections: Describes the number of section divisions for transmitting the logo data module.

  The information other than the expanded part of FIG. 17 is defined as follows in the configuration of Table 7-79 MH-logo transmission descriptor in 7.4.3.34 of ARIB STD-B60 1.4 version.

  “Logo_transmission_type (logo transmission type): This 8-bit field indicates the logo transmission method shown in Table 7-80 (see ARIB STD-B21).

  logo_id (logo identification): These 9 bits describe the ID of the logo data defined for the service (see ARIB STD-B21).

  logo_version (logo version number): This 12-bit field describes the version number of the logo_id (see ARIB STD-B21).

  download_data_id (download data identification): This 16-bit field represents the identification of data to be downloaded. It matches the value of download_data_id of MH-CDT where logo data is placed (see ARIB STD-B21).

  logo_char (character string for simple logo): These 8 bits describe the character string for simple logo. As described above, in the logo processing in the transmission device, the reception device, and the transmission / reception device according to the second embodiment, the necessary number of logo data of the required type is selected without depending on the size of the logo data. Thus, it is possible to efficiently transmit in an arbitrary order.

  Furthermore, by expanding the MH-SDT and describing the logo data distribution information, the logo data distribution information can be acquired before acquiring the MH-CDT. Therefore, at the receiver side, one of the MH-CDT sections is selected first. Speaking in FIG. 15 that the logo data distribution descriptor is acquired and the logo data distribution descriptor is confirmed, the step S25 is not necessary, and the necessary logo_type logo data can be acquired more efficiently.

  Note that the processing of this embodiment can also be applied to the case of the MPEG-2 TS system of the first embodiment.

(Configuration of Broadcast Reception Device 1a of Second Embodiment)
As a configuration of the broadcast receiving apparatus 1a of the second embodiment, the TS processing unit 204 in FIG. 14 is changed to the TLV / MMT separation unit 12. The broadcast receiver 1a receives a broadcast wave reception signal obtained by a reception antenna (not shown), obtains a TLV stream by performing demodulation processing and error correction decoding processing in the transmission path demodulation / decoding unit 201, and performs TS processing. Instead of the unit 204, the TLV / MMT separation unit 12 separates the video stream and the audio stream from the TLV stream, and outputs them to the video decoding unit 205 and the audio processing unit 206.

(Third embodiment)
The third embodiment is based on the second embodiment, and only differences from the second embodiment will be described.

(Third embodiment Processing of receiving apparatus when audio stream is switched)
The processing of the receiving device when the audio stream is switched is the same as in the first embodiment.

(Logo processing in the third embodiment)
The third embodiment can be realized by a transmission device similar to the second embodiment. However, the logo data distribution information is not inserted into the MH-logo transmission descriptor. Logo data distribution information is fixedly determined in advance according to operation rules, or additionally inserted into data_module_byte of MH-CDT.

  In advanced broadband satellite digital broadcasting, logo_type for three types of size patterns is defined. One is “2K”, which is the same as “HD large” defined in terrestrial digital broadcasting. The other two are “Small” assuming display on a 4K screen and “Large” assuming display on an 8K screen. The number of vertical and horizontal pixels is double each compared to “2K”. 4 times. In the “small” and “large” logos, although the number of colors used at the same time is limited, a color palette is also transmitted in order to be able to use RGB 8-bit full color colors. For this reason, the upper limit of the logo data size is large.

  The “2K” logo has the same upper limit of 1152 bytes as the size of “HD Large” for terrestrial digital broadcasting. It can be sent with one MH-CDT, but “Small” is 8000 bytes and “Large” is 16000 bytes. An upper limit is assumed and cannot be sent with one MH-CDT. For this reason, the regulations for transmitting the logo data with a plurality of MH-CDTs are newly required.

  Hereinafter, as a third embodiment, a method for transmitting logo data using a plurality of MH-CDTs will be described.

  FIG. 18 shows a flow of processing according to the third embodiment. In FIG. 18, the input of logo data is waited (step S31), and when logo data is input, it is determined whether logo_type indicates 2K, large, or small, and logo data is displayed for each logo_type. The value of section_number to be distributed is set (step S32). Subsequently, in consideration of the maximum capacity of the MH-CDT, the logo data is divided and set in the data_module_byte of the MH-CDT section together with the arrangement information (step S33), and the series of processes is terminated.

  That is, in the third embodiment, a service logo of a large size that does not fit in one section is transmitted by MH-CDT by changing only the operation rule such as changing the definition of data_module_byte. Therefore, a new data structure other than MH-CDT is added, or a new descriptor to be inserted into MH-CDT is added, or the definition of MH-logo transmission descriptor is changed and added to the ARIB standard. There is no need to make changes.

  Hereinafter, Examples 1 to 5 of the logo processing of the third embodiment will be described as specific processing of the third embodiment.

[Example 1 of logo processing of the third embodiment]
In the logo data modularization unit 101 shown in FIG. 10, with respect to the data_module_byte syntax of digital terrestrial broadcasting, the number of logo_type logo bytes, that is, the total size of data divided into each section, Add a field called "total_logo_size". An example is shown in FIG. Also, instead of being stipulated in the digital terrestrial broadcasting as “Transmit a logo of each size in the section with the section_number that matches the logo_type value”, the section_number value used for each logo_type is fixed and used. Make provisions in the regulations.

Here
2K 0
Large 1-4
Small 5-6
And

  Also, logo data is divided every 4000 bytes and stored in data_byte. By deciding in this way, the section_number range of the section acquired for receiving the logo of each logo_type can be known in advance without using the received information in the MH-CDT. For example, if you want only a small logo, instead of acquiring all sections with section_number from 0 to 6 and then determining the logo_type in data_module_byte, it is not determined that the sections with section_number of 5 and 6 are applicable. Only the sections 5 and 6 need to be acquired.

  Also, by adding the total_logo_size and determining the division size, it becomes possible to determine that it is not necessary to receive all sections of section_number determined by logo_type. For example, if the total_logo_size is 10000 bytes with a large logo, it can be seen that the data_size of sections with section_number 1 to 4 is 4000 byte, 4000 byte, 2000 byte, 0 byte, respectively, and that section with section_number = 4 is not required to be acquired. . Similarly, if the section with section_number = 5 is acquired and the total_logo_size is 4000 bytes or less, it is understood that the section with section_number = 6 need not be acquired.

  Here, as an example, the values of section_number are assigned in the order of the logotype values, but this order may not be used.

  In this example, the division size is 4000 bytes as an example, but another value may be used. For example, a division size may be set to 4070 bytes, and a logo with a total_logo_size of 10000 bytes may be divided into 4070 bytes, 4070 bytes, 1860 bytes, and 0 bytes.

Also, as an example here, total_logo_size is added to data_module_byte to determine the partition size, but without determining the partition size, you can add information about whether there is a continuation in data_module_byte, and also determine the partition size In addition, other information such as whether there is a continuation may be added.

[Example 2 of logo processing of the third embodiment]
It is not known in which order the sections are sent in the stream. If one section is acquired and the next section is acquired, the time until all desired sections are acquired may increase. Further, by simultaneously setting the section filter, the acquisition time can be shortened, but a lot of section filter resources are consumed.

  As a means for avoiding this, it is conceivable to specify a mask for the section filter condition.

  For some bits, this is a function for acquiring a section regardless of whether the value is 0 or 1. Regarding the mask designation of section_number, the bit designated as 0 is designated as 0, the bit designated as 0, and the bit which may be 0 or 1 is represented by x.

  The large logo has a maximum of 4 sections and the small logo has a maximum of 2 sections. Masking with 2 bits for the large logo and 1 bit for the small logo is efficient. Therefore, the mask designation of section_number of the large logo is set to 000001xx (00000100, 00000101, 00000110, 00000111), and the mask designation of section_number of the small logo is set to 0000001x (00000010, 00000011).

In this way, the section_number value used is small 2-3
Large 4-7
It becomes.

in addition
2K 0
In this case, the section with section_number = 1 becomes unnecessary.

  Normally, section_number is arranged from 0 to last_section_number without omission, but EIT [schedule] (and MH-EIT [schedule]) is an operation in which an intermediate section may be missed as an exception. Therefore, if MH-CDT is specified to perform an exception operation in which section_number = 1 is not sent, logo_type logo data can be transmitted in seven sections with section_number 0 and 2-7. .

  Here, section_number = 1 is an unnecessary section as an example, but section_number = 0 may be an unnecessary section, and logo_type logo data may be transmitted in seven sections whose section_number is 1 to 7.

[Example 3 of logo processing of the third embodiment]
If the mask designation similar to that of the second embodiment is used, if it can be shown that the data is invalid, it can be realized without performing an exceptional operation that does not send an intermediate section.

  For example, it can be realized by deciding that the value of 0xFF will not be used as the logo_type in the future, and that if the value of the data_module_byte's logo_type is 0xFF, it is determined to be invalid data. In the case of a receiver that acquires only the section of the necessary section_number, this section is not acquired, so that the processing is not affected. In the case of a receiver that acquires all sections of section_number using the section filter mask function, it may be determined that the data is invalid and discarded.

[Example 4 of logo processing of the third embodiment]
Alternatively, when the same mask designation as that of the second embodiment is performed, the logo data itself is not sent for one section, but can be used for transmitting other information.

  The 2K logo is transmitted with section_number = 1, the section_number = 0 is transmitted with different information, section_number = 0 is used for special data, and section_number 1-7 are used for transmitting logo data. it can.

  For example, as shown in FIG. 20, data_module_byte in the case of section_number = 0 can indicate which logo_type logo data is transmitted with each section number, that is, logo data distribution information. In the example of FIG. 20, a number_of_logo_type that is the number of logo_types is looped so that the number of logo data bytes for each section_number (start_section_number + j) used in each logo_type can be specified.

[Example 5 of logo processing of the third embodiment]
If data_module_byte as shown in FIG. 20 is transmitted with section_number = 0, even if the range of section_number used in each logo_type is not fixed in the operation regulations, section_number of desired logo_type after obtaining section_number = 0 By taking the two steps of obtaining the section, it is possible to obtain a desired logo_type service logo. Although it may take a long time to acquire a desired logo by taking two steps, it is possible to cope with the case where a logo_type is newly added in the future.

  When the section_number range is not fixed in the operation rules, the number of sections used in logo_type may be fixed to the maximum, or may be variable depending on the size of the logo data.

  As described above, in the logo processing in the transmission device, the reception device, and the transmission / reception device according to the third embodiment, a new data structure that is not MH-CDT can be obtained by changing the definition of data_module_byte and the assignment rule of section_number, Or, a new descriptor to be inserted into the MH-CDT is defined in the ARIB standard, or the definition of the MH-logo transmission descriptor in the ARIB standard is not changed. The service logo can be transmitted by MH-CDT.

  Further, in Examples 1 to 4 of the logo processing of the third embodiment, it is possible to acquire only a section of a desired logo_type section_number as in the case of terrestrial digital broadcasting. In the logo processing examples 2 to 4 of the third embodiment, it is possible to efficiently acquire a large logo and a small logo by setting a section filter by masking section_number. . In addition, in Example 5 of the logo processing of the third embodiment, it is possible to cope with a case where a logo_type is newly added in the future.

  In the third embodiment, CDT and MH-CDT are collectively referred to as common data table information, SDT and MH-SDT are collectively referred to as service description table information, and the logo transmission descriptor and the MH-logo transmission descriptor are defined as It shall be generically called a logo transmission descriptor.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof. Further, “broadcast” in this specification includes “IP broadcast” using an Internet protocol.

(1) Digital television capable of multiplexing and transmitting an arbitrary number of logo data of different types for each logo identification in multiple sections of the common data table information, with a size exceeding the amount of data that can be sent in one section of the common data table information A broadcasting system,
By modularization, the logo data is modularized for each logo identification and logo type,
The first sectioning unit distributes the logo data modularized by the modularization unit to a plurality of sections of the common data table information having the same download data identification, and outputs the logo data for the logo data. Generate and output logo data distribution information indicating the correspondence between the type of the file and the section to be distributed,
The second sectioning unit generates a logo transmission descriptor from the logo identification and logo version number of the logo data included in the logo management information, and the logo data distribution information having the same download data identification as the download data identification. Information is generated and inserted into the service description table information,
A transmission system for transmitting a broadcast signal obtained by multiplexing the common data table information generated by the first sectioning unit and the service description table information generated by the second sectioning unit by a multiplexing unit;
The broadcast signal is received to acquire the service description table information, and the logo transmission descriptor information is extracted from the acquired service description table information to obtain the logo transmission information, logo management information, and logo data distribution information. Logo identification and logo type stored in the module from a plurality of sections acquired and distributed to the common data table information of the broadcast signal based on the acquired logo transmission information, logo management information and logo data distribution information A transmission / reception device comprising a receiving system for acquiring logo data for each.

(2) Digital television capable of multiplexing and transmitting an arbitrary number of logo data of different types for each logo identification in multiple sections of common data table information, with a size exceeding the amount of data that can be sent in one section of common data table information Used in broadcasting systems,
A modularization unit that modularizes the logo data for each logo type and logo type,
The logo data modularized by the modularization unit is distributed and outputted to a plurality of sections of the common data table information having the same download data identification, and the logo type and the section to be distributed for the logo data A first sectioning unit for generating and outputting logo data distribution information indicating a correspondence relationship with
Service information is generated by generating logo transmission descriptor information from the logo identification and logo version number of the logo data included in the logo management information and the logo data distribution information having the same download data identification as the download data identification. A second sectioning section to be inserted into the table information;
A transmission apparatus comprising: a multiplexing unit that transmits a broadcast signal obtained by multiplexing the common data table information generated by the first sectioning unit and the service description table information generated by the second sectioning unit .

(3) Used in a digital television broadcasting system capable of multiplexing and transmitting an arbitrary number of logo data of different types per logo identification, with a size exceeding the amount of data that can be sent in one section of common data table information.
By modularization, the logo data is modularized for each logo identification and logo type,
The first sectioning unit distributes the logo data modularized by the modularization unit to a plurality of sections of the common data table information having the same download data identification, and outputs the logo data for the logo data. Generate and output logo data distribution information indicating the correspondence between the type of the file and the section to be distributed,
The second sectioning unit generates a logo transmission descriptor from the logo identification and logo version number of the logo data included in the logo management information, and the logo data distribution information having the same download data identification as the download data identification. Information is generated and inserted into the service description table information,
Corresponds to a transmission system for transmitting a broadcast signal in which the common data table information generated by the first sectioning unit and the service description table information generated by the second sectioning unit are multiplexed by the multiplexing unit. A receiving device,
A receiver for receiving the broadcast signal;
The service description table information is acquired from the broadcast signal received by the receiving unit, the logo transmission descriptor information is extracted from the acquired service description table information, and the logo transmission information, logo management information, and logo data distribution are extracted. Information, and the logo identification stored in the module from a plurality of sections distributed to the common data table information of the broadcast signal based on the acquired logo transmission information, logo management information, and logo data distribution information, A logo data acquisition unit for acquiring logo data for each type of logo,
A receiving apparatus comprising:

  In the first to third embodiments described above, the present invention is described as an example in which the present invention is applied to transmission of service logo data such as a logo mark used in a program column. However, the present invention transmits other image data. You may apply to.

  DESCRIPTION OF SYMBOLS 1,1a ... Broadcast receiving apparatus, 1A ... Video processing part, 1B ... GUI display part, 1C ... Operation input part, 2 ... AV amplifier, 3 ... Display apparatus, 11 ... Transmission path demodulation / decoding part, 12 ... TLV / MMT Separation unit, 13 ... audio selection control unit, 14 ... decoder, 15 ... DMIX unit, 16 ... switching unit, 17 ... DAC, 18 ... audio output unit, 19 ... external output interface, 21 ... logo data modularization unit, 22 ... MH-CDT sectioning unit, 23 ... MH-logo transmission descriptor generation unit, 24 ... MH-SDT sectioning unit, 25 ... MMT multiplexing unit, 26 ... transmission path coding / modulation unit, 101 ... logo data modularization , 102 ... CDT sectioning unit, 103 ... logo data distribution descriptor generation unit, 104 ... logo transmission descriptor generation unit, 105 ... SDT sectioning unit, 106 ... multiplexing unit, 107 Transmission path coding / modulation section 201 ... Transmission path demodulation / decoding section 202 ... Module I / F section 203 ... Section processing section 204 ... TS processing section 205 ... Video decoding section 206 ... Audio processing section 207 DESCRIPTION OF SYMBOLS ... OSD process part, 208 ... Communication I / F part, 209 ... Operation part, 210 ... NVRAM, 211 ... ROM, 212 ... RAM, 213 ... CPU, 214 ... Descrambler, 215 ... Storage part, 216 ... Bus.

Claims (1)

A transmitting apparatus and a transmitting / receiving method in a receiving apparatus for transmitting logo data indicating a logo by a TLV stream in a section format table CDT (Common Data Table) based on TLV (Type Length Value) / MMT (MPEG Media Transport),
The logo data is prepared according to the number of pixels,
The logo data by number of pixels is identified by the logo type,
The logo transmission descriptor arranged in the descriptor area of the service description table transmitted by the TLV stream changes depending on the logo transmission type,
When the logo transmission type of the logo transmission descriptor is 0x01, the logo transmission descriptor is
Logo identification that describes the ID of the logo data defined in the service description table;
A logo version number describing the version number of the logo identification;
Download data identification representing the identification of the data to be downloaded;
For each type of logotype, the start section number that represents the first section number to transmit the logotype and logo data of the logotype divided and the number of transmission sections that represents the number of sections that transmit the logotype logo data And including
The logo version number is after the logo identification,
There is the download data identification after the logo version number,
After the download data identification is the logotype,
There is the starting section number after the logotype,
The transmission section number is after the start section number;
The transmitter transmits the logo data identified by the logo type by dividing it into CDT sections having consecutive section numbers,
The receiving apparatus acquires the logo data based on the start section number and the number of transmission sections included in the logo transmission descriptor arranged in the descriptor area of the service description table transmitted by the TLV stream. Transmission / reception method.

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