JP6646775B2 - Receiver - Google Patents

Description

  The present invention relates to a receiving device.

  In a digital television broadcasting system for advanced BS / advanced broadband CS broadcasting, MPEG4-AAC (Moving Picture Experts Group 4-Advanced Audio Coding) (1ch, 2ch, 5.1ch, 7.1ch, 22.2ch) is used as an audio stream profile. The adoption of 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 equipment (including an AV amplifier, a sound bar, and the like), an optical cable / coaxial cable compliant with the S / PDIF (Sony Philips Digital Interface) standard, or HDMI ( (Registered trademark) -Forum (High-Definition Multimedia Interface-Forum). In each case, the signal transmission system is standardized by IEC61937.

  However, the bit rate of an audio stream that can be transmitted according to the current S / PDIF standard is up to about 1.5 Mbps, and in the case of MPEG4-AAC, up to 7.1 ch can be transmitted according to the current S / PDIF standard. However, with 22.2 ch, the bit rate is insufficient and transmission is impossible. For this reason, IEC61937 has been revised and studies are underway to extend the transmission rate to about 3 Mbps by increasing the clock frequency during transmission to twice the speed. Further, in the case of 5.1ch of MPEG4-ALS, since the maximum bit rate of the stream is about 7.3 Mbps, studies are underway to support a transmission clock frequency of up to 8 times speed so that the stream can be transmitted.

  At present, HDTV (High Definition Television) video signals having a horizontal pixel count of 1920 or 1440 and a vertical pixel count of 1080 are mainly used in digital television broadcasting. Came to be required. For this reason, standardization has been standardized for ultra-high-definition television broadcasting using 4K (3840 × 2160) or 16K (7680 × 4320) 8K UHDTV (Ultra High Definition Television), which has four times the number of screen pixels (3840 × 2160) compared to HDTV. Is underway.

  By the way, in the current terrestrial digital 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, Volume 5.4, in section 5.4, in the CDT system transmission, for the section_number field, "There is a section without omission from 0 to the number indicated by last_section_number. In the case of 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 transmitting logo data with a certain logo_type value, all types of logo data from 0 to the logo_type value must be transmitted in one section unit (one section per logo) without any loss. means.

ARIB STD-B63 1.1, "Receiver Standard for Advanced Broadband Satellite Digital Broadcasting" Revised on March 17, 2015, Japan Radio Industry Association ARIB STD-B60 Version 1.4 formulated on September 30, 2015, "Standards for MMT Media Transport System in Digital Broadcasting", Japan Radio Industry Association "Digital Terrestrial Television Broadcasting Operational Regulations" ARIB TR-B14 Version 5.9 Revised on July 3, 2015 Part 1

  An object of the present embodiment is to provide a broadcasting system and a transmitting device and a receiving device for solving the problem that occurs in a digital television broadcasting system when performing advanced BS / advanced broadband CS broadcasting.

  The receiving device according to the embodiment is a receiving device that acquires the logo data transmitted from a transmitting device that transmits logo data indicating a logo by a TLV (Type Length Value) stream.

In this receiver,
The logo data is prepared for each pixel number,
The logo data by pixel number is identified by the logo type,
The description content of 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 describing 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;
Logotype,
A start section number indicating the first section number for dividing and transmitting the logo data of the logo type;
Transmission section number indicating the number of sections transmitting the logo data of the logotype, and
The logo data identified by the logo type is assigned to a section having a continuous section number by the transmitting device,
The plurality of logo data of different logo types are continuously assigned to sections starting from section number 0 by the transmitting device,
The logo data of the first pixel number is assigned to the section of section number 0 by the transmitting device,
Logo data of a second pixel number larger than the first pixel number is assigned to a plurality of sections starting from section number 1 by the transmission device,
The logo transmission descriptor arranged in the descriptor area of the service description table is multiplexed with the data of the section,
The multiplexed signal is error-correction-coded, modulated, and transmitted by the transmitting device,
A receiving device for acquiring 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.

FIG. 2 is a block diagram showing a configuration of a broadcast receiving apparatus in advanced BS / advanced broadband CS broadcasting according to a process when the audio stream is switched according to the first embodiment. FIG. 2 is a block diagram for explaining switching of an audio profile when the broadcast receiver shown in FIG. 1 is connected to an AV amplifier. The figure which shows the operation | movement at the time of receiving the broadcast whose audio asset (audio mode) changes from AAC 2ch to ALS 2ch in the broadcast receiving apparatus and external AV amplifier of the conventional system. The figure which shows the operation | movement at the time of receiving the broadcast which the audio mode changes from MPEG4-AAC 2ch to MPEG4-AAC 5.1ch in the broadcast receiving apparatus and external AV amplifier of a conventional system. The figure which shows the operation | movement at the time of receiving the broadcast which the audio mode changes from MPEG4-AAC 2ch to MPEG4-AAC 22.2ch in the broadcast receiving apparatus and external AV amplifier of a conventional system. FIG. 2 is a diagram showing an operation when the broadcast receiving apparatus shown in FIG. 1 receives a broadcast that changes from AAC 2 ch to AAC 22.2 ch when the profile is in the B connection mode. FIG. 2 is a diagram showing an operation when the broadcast receiving apparatus shown in FIG. 1 receives a broadcast that changes from AAC 2 ch to AAC 22.2 ch when the profile is in the A connection mode. 3 is a flowchart for explaining a pre-mode setting of a profile in the broadcast receiving device shown in FIG. 1. 3 is a flowchart for explaining a switching process at the time of receiving a broadcast in the broadcast receiving device shown in FIG. 1. FIG. 2 is a block diagram showing a configuration of a transmission device of the digital television broadcasting system according to the logo processing of the first embodiment. FIG. 11 is a diagram for explaining an area for storing a processing result of the logo data module unit of the transmission device shown in FIG. 10. FIG. 11 is a diagram showing a CDT data structure used in a CDT sectioning unit of the transmission device shown in FIG. 10. FIG. 11 is a diagram showing a data structure of a logo data distribution descriptor of the transmission device shown in FIG. 10. FIG. 2 is a block diagram showing the configuration of a receiving device of the digital television broadcasting system according to the logo processing of the first embodiment. 15 is a flowchart for explaining a processing operation regarding logo data of the receiving device shown in FIG. 14. FIG. 9 is a block diagram showing a configuration of a transmission device of the digital television broadcasting system according to the second and third embodiments. FIG. 17 is a diagram illustrating a data structure obtained by expanding an MH-logo transmission descriptor in the transmission device illustrated in FIG. 16. 9 is a flowchart for explaining a processing operation of the transmission device of the digital television broadcasting system according to the third embodiment. FIG. 19 is a diagram illustrating a data structure related to data_module_byte in the processing operation illustrated in FIG. 18. FIG. 19 is a diagram illustrating another data structure related to data_module_byte in the processing operation illustrated in FIG. 18.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The transmission / reception device of the embodiment can multiplex and transmit any number of different types of logo data for one logo identification in a plurality of sections of the common data table information, with a size exceeding the amount of data that can be transmitted in one section of the common data table information. Transmission and reception device.

  The transmitting apparatus of the embodiment can multiplex and transmit an arbitrary number of different types of logo data for one logo identification in a plurality of sections of the common data table information, with a size exceeding the amount of data that can be transmitted in one section of the common data table information. This is a transmission device used for a simple transmission and reception system.

  The receiving apparatus according to the embodiment can multiplex and transmit an arbitrary number of different types of logo data for one logo identification in a plurality of sections of the common data table information with a size exceeding the data amount that can be sent in one section of the common data table information. This is a receiving device used for a simple transmitting / receiving system.

  When the double mode and the eight-time mode of the transmission clock are defined in the IEC61937, a broadcast receiving apparatus and an audio device capable of transmitting up to 5.1 ch of MPEG4-ALS can be manufactured according to the standard. However, in order to operate the transmission clock at 2 × or 8 × speed, it is necessary to employ dedicated parts and the like, so that the cost of the product increases.

  Also, considering that most audio is MPEG4-AAC 2ch or 5.1ch in actual broadcasting, if audio equipment is inexpensive in terms of cost, it will be up to 1.5 Mbps, which is equivalent to the conventional one, up to 1x speed. It is desirable to make a distinction such that only high-end models that support MPEG4-AAC 22.2ch or MPEG4-ALS support up to 2x speed or 8x speed. However, when an audio device is connected to a receiving device via an optical cable or a coaxial cable, there is a way for the receiving device to know how many times the connected audio device supports (which profile corresponds). Absent. Therefore, unless the receiving device performs some setting by user operation, double-speed mode audio is output to an audio device that does not support double-speed mode audio, and there is a problem that no sound is output 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, and the first audio signal can be transmitted at both the first transmission clock frequency and the second transmission clock frequency. If 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 audio equipment that does not support the second transmission clock frequency. There is a problem that no sound is produced.

  Also, since a plurality of audio modes are transmitted simultaneously and can be arbitrarily selected on the receiving side, it is desirable to identify and display the audio 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 frequency. A mode suitable for the corresponding transmission clock frequency of the connected audio device when the second audio signal can be transmitted 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 broadcast system, a broadcast transmission device, a broadcast reception device, a broadcast transmission / reception method, a broadcast transmission method, and a broadcast reception method capable of outputting a voice signal received by a user and further capable of identifying and displaying a voice mode to a user are provided. You.

  Also, for example, in the above-described method of transmitting logo data in digital television broadcasting, it is not possible to transmit a type of logo data having a size exceeding one section, in other words, a size extending over a plurality of sections. 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, when digital television broadcasting is made ultra-high definition, the expandability, flexibility, transmission efficiency, and the like of logo data operation are impaired.

  According to the embodiment, there is also provided a broadcasting system capable of extending the operation of logo data and improving flexibility, transmission efficiency, and the like, when transmitting ultra-high definition video, and a transmission device and a reception device thereof.

(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 an audio stream is switched and a portion related to a logo process. However, the present invention does not necessarily require both processes. Alone can be an invention.

(1st Embodiment Processing of receiving apparatus when audio stream is switched)
First, a process when the audio stream is switched according to the first embodiment will be described.

  Hereinafter, with reference to FIGS. 1 to 9, a description will be given of the 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. The broadcast receiving apparatus receives a broadcast wave reception signal obtained by a receiving antenna (not shown), performs demodulation processing and error correction decoding processing in a transmission path demodulation / decoding section 11, obtains a TLV stream, and obtains the 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 applicable to 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, and Output to each external output system.

  In the internal reproduction system, the decoder 14 decodes the selected audio asset. If the decoded output is 5.1-ch PCM data, the down-mixer (DMIX) unit 15 converts it into 2-ch 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. The switching unit 16 selects one of 2ch from the down mixer unit 15 and 2ch directly supplied from the decoder 14 at the input based on an instruction from the audio selection control unit 13, and outputs an internal reproduction system and an external Select one of the output systems.

  The 2-channel PCM data selectively output to the internal reproduction system by the switching unit 16 is converted into an analog audio signal by a DAC (Digital-Analog Converter) 17 and sent to an audio output unit 18 using an internal amplifier and a speaker to reproduce the sound. Is done. The 2ch PCM data selectively output to the external output system is sent to an 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 an HDMI cable, an S / PDIF optical digital cable, an S / PDIF It can be connected by a PDIF coaxial digital cable, and outputs the audio asset selected by the audio selection control unit 13 to the externally connected AV amplifier 2. When the corresponding audio mode information of the externally connected AV amplifier 2 has not been obtained, the PCM data of two channels 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 audio mode information corresponding to 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, , So as to output the audio asset.

  On the other hand, the video stream obtained by the transmission path demodulation / decoding section 11 is sent to the video processing section 1A. The video processing unit 1A generates a video signal of a predetermined resolution from an input video stream, sends it to the display device 3, and displays it. Here, when the audio mode corresponding to the connected AV amplifier 2 has not been registered and set, the audio selection control unit 13 displays a GUI (Graphical User Interface) display unit 1B for prompting a mode selection input operation. Send instructions to do so. Upon receiving 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 looks at the screen and operates the operation input unit 1C to select the corresponding audio mode of the AV amplifier 2, 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 connecting an external AV amplifier 2 to the broadcast receiving device 1 and transmitting an audio asset. In FIG. 2, the connection between the receiving apparatus 1 and the external AV amplifier 2 is performed by any 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 a form such as 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 device 1 to the external AV amplifier 2 together with the video signal. On the other hand, when the receiving device 1 is in a form like a television, an HDMI output terminal of the external AV amplifier 2 is connected to the receiving device (television) 1 in order to input a video / audio signal 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, the function (HDMI-ARC: audio return channel) of transmitting only an audio signal from the receiving device (television) 1 to the external AV amplifier 2 over the HDMI cable is used, so that the audio of the receiving device (television) is used. The signal can be transmitted to the external AV amplifier 2. 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 S / PDIF coaxial digital cable, the digital audio output terminal of the receiving device 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 device 1 to the external AV amplifier 2 is only one audio asset. When receiving a broadcast including a plurality of audio assets, the receiving device 1 selects and outputs one audio asset to be output to the external AV amplifier 2.

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

As shown in FIG. 2, the receiving device 1 receives a broadcast wave (TLV stream) including a plurality of audio streams (maximum number of audio assets: 4). For example, in the advanced broadband CS broadcasting, seven types of audio modes can be operated (in the advanced BS digital broadcasting, AAC 1.0ch is not operated, so six types). Of these, when broadcasting in any audio mode other than the three audio modes of AAC 1.0ch (not operated in the advanced BS), AAC 2.0ch, and AAC 5.1ch, which is required to be played back by the receiving device 1 alone, Audio is broadcast simultaneously. Table 1 shows a combination example of the audio mode and the simultaneous audio in the broadcast.

  The receiving device 1 selects one asset to be output from such a plurality of audio assets, and outputs the selected asset to the external AV amplifier 2. The user may arbitrarily select an asset to be output, or may automatically select an asset when an 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, as in the case of the reproduction by the main body of the receiving device 1, priority is given to an asset having a small component tag value. Further, a function of decoding the audio stream in the receiving device 1 and outputting the decoded audio stream to the external AV amplifier 2 by linear PCM may be provided.

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

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

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

  When transmitting AAC 22.2ch and ALS audio, 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 a double speed or higher. Currently, we are preparing to revise the standards of IEC60958 and IEC61937 corresponding to this.

  As an operation example when outputting a broadcast whose audio mode changes to the external AV amplifier 2, the receiving device 1 and the external AV amplifier 2 when receiving a broadcast whose audio mode changes from MPEG4-AAC 2 ch to MPEG4-ALS 2 ch 3 is shown in FIG.

  The receiving device 1 receives an AAC 2ch asset, which is a preceding sound (FIG. 3A), and outputs it to the S / PDIF at a frame rate of 48 kHz (FIG. 3B). The external AV amplifier 2 receives the stream, decodes the stream, and outputs sound to a speaker (FIG. 3C). When the preceding audio asset of the broadcast stops in this state (FIG. 3A), the receiving device 1 outputs a NULL data stream to the S / PDIF for 50 msec or more according to IEC60958-1 (FIG. 3B), / Stop output to PDIF. With this NULL data stream, the external AV amplifier 2 emits the audio stream stored in the buffer.

  When the receiving device 1 receives the ALS 2ch asset which is the subsequent audio (FIG. 3A), the receiving device 1 changes the S / PDIF frame rate to 96 kHz and outputs the ALS 2ch stream (FIG. 3 ( b)). The external AV amplifier 2 that receives such a stream that changes on the S / PDIF performs resynchronization processing by the PLL circuit on the change in the frame rate. Thereafter, the format of the audio stream 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. 3 (c)).

  4 and 5 show the change in the audio mode in the broadcast signal when the stream in which the audio mode changes in the middle is broadcast in the advanced BS / advanced broadband CS digital broadcast, and the S / PDIF 2 shows the relationship between the signal output from the AV amplifier 2 and the audio data output from the AV amplifier 2.

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

  The receiving apparatus 1 stops the output of the audio stream to the S / PDIF when it sees the contents of the MPT and finds that the audio changes from AAC 2ch to 5.1ch. However, since it is known that the subsequent audio is 5.1ch and can be transmitted by 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 the signal from the S / PDIF outputs the AAC 2ch sound to the speaker while the AAC 2ch sound is being input, and stops the sound output when it enters the non-sound section. Next, when an audio signal is input, a process of detecting what the audio is is performed, and when it is determined that the 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. 4 is different from the case of FIG. 4 in that the transmission clock of MPEG4-AAC 22.2ch cannot be transmitted at a bit rate of 48 kHz of the S / PDIF transmission clock, and the transmission clock needs to be switched to 96 kHz (double speed). .

  Receiving the change of the audio mode by updating the MPT, the receiving apparatus 1 stops the output of the AAC 2ch audio of the S / PDIF when it knows that the subsequent audio is MPEG4-AAC 22.2ch which requires transmission at 96 kHz. After that, the output of the 48 kHz transmission clock is also stopped. After that, the audio-free data of the transmission clock of 96 kHz is output to the S / PDIF, and when the 22.2ch audio stream is received, the audio is output to the S / PDIF.

  Upon receiving the signal from the S / PDIF, the AV amplifier 2 receives the signal of the transmission clock of 96 kHz after the signal of 48 kHz of AAC 2ch is cut off, and synchronizes with the receiving device 1 at the frequency of 96 kHz by the PLL when receiving the signal of the transmission clock of 96 kHz. I do. After the elapse of the time required for the synchronization (about 200 msec), the audio signal is received, and it is determined that the AAC is 22.2ch, and then a sound is output from the speaker. When the audio mode changes with different transmission clocks as described above, there is a problem that the time required for outputting a sound becomes longer. As shown in FIG. 3, the same problem occurs when the audio mode is switched from MPEG4-AAC 2ch to MPEG4-ALS because the transmission clock frequency is different.

As described in the subject, the audio mode is extended in the advanced BS broadcasting. As a result, there is an audio mode in which transmission cannot be performed due to insufficient transmission rate at the transmission clock frequency defined by the conventional S / PDIF standard. For this reason, the S / PDIF standard has been revised to extend 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.

  The AV amplifier (including a device such as a sound bar) 2 compatible with advanced BS broadcasting does not need to receive and output all the audio modes defined in the standard as shown in Table 3, and AAC 1ch / 2ch It is possible to commercialize a product that supports only /5.1ch. In this case, the transmission clock frequency of the S / PDIF only needs to correspond to 48 kHz.

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

In this embodiment, AV amplifier products are classified into three profiles as shown in Table 4 in order to easily convey these distinctions to general consumers.

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

  In the advanced BS broadcasting, when such an audio stream is switched, the MPT is updated 100 msec before the switching, and the receiving 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 sound from the built-in speaker, if the switching of the audio mode is grasped in advance by updating the MPT, the receiving device (TV) 1 first outputs the leading audio. To prepare for switching, change the setting of the decoder according to the audio mode for 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 sound is output to a speaker via the AV amplifier 2, as shown in FIG. MPEG4-AAC 2ch) is output to S / PDIF. When the switching of the audio mode is detected by updating the MPT, the output of the preceding audio to the S / PDIF is stopped. However, the S / PDIF transmission clock continues to be output at 48 kHz. Upon receiving the subsequent audio (MPEG4-AAC 5.1ch), the receiving device (TV) 1 outputs a stream of the subsequent audio 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, when the audio mode is switched, the AV amplifier 2 checks the content of the received audio stream each time, and detects a change from AAC 2 ch to AAC 5.1 ch. For this reason, the subsequent sound is output from the speaker with a certain delay from the point at which 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 switching of the audio mode.

  The above example describes a case where the transmission clock frequency of the S / PDIF is changed within a range of the audio mode in which transmission is possible at 48 kHz, that is, a change from MPEG4-AAC 2ch to MPEG4-AAC 5.1ch. . FIG. 5 shows audio mode switching that requires switching to a different transmission clock frequency from MPEG4-AAC 2ch to MPEG4-AAC 22.2ch.

  The receiving apparatus (TV) 1 that has received the MPEG4-AAC 2ch audio, which is the preceding audio, transmits the AAC 2ch stream at a transmission clock frequency of 48 kHz when outputting the audio stream to the S / PDIF. Upon receiving the update of the MPT, the receiving device (TV) 1 that has recognized that the subsequent audio is MPEG4-AAC 22.2ch first stops transmitting the preceding audio. Next, since the subsequent audio is in an audio mode that cannot be transmitted without a 96 kHz clock, the 48 kHz transmission clock is also stopped, and then a 96 kHz transmission clock is output. After that, when the subsequent audio is received, an audio stream of 22.2 ch of MPEG4-AAC is transmitted at a clock of 96 kHz.

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

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

  To avoid this problem, the receiving device (TV) 1 determines which transmission clock frequency the AV amplifier 2 connected to the receiving device (TV) 1 can support, that is, 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, HDMI extended display identifier (EDID) or HDMI-CEC (High Definition Multimedia Interface-Consumer Electronics Control) is used. Based on the information that can be obtained, the receiving device (TV) 1 determines to which profile the AV amplifier 2 belongs, 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 device (TV) 1 stores and sets “Profile-A connection mode”. When an AV amplifier compatible with 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 device (TV) 1 and the AV amplifier 2 is an S / PDIF optical cable or a coaxial cable, the receiving device (TV) 1 cannot acquire information on 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 device (TV) 1, and the user is caused to input the menu.

  By providing the receiving device (TV) 1 with a function of storing and setting a “profile connection mode” indicating which profile the AV amplifier 2 connected to the receiving device (TV) 1 belongs to, the receiving device (TV) 1 6 and FIG. 7 show the audio streams output from the S / PDIF to the S / PDIF. 6 and 7 show signals output from the receiver (TV) 1 for each mode to the S / PDIF when receiving a broadcast in which the audio stream changes from MPEG4-AAC 2ch to MPEG4-AAC 22.2ch. FIG.

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

  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 the “Profile-A connection mode” outputs the MPEG4-AAC 2ch audio to the S / PDIF, the receiver (TV) 1 cannot use a clock other than 48 kHz in the first place to the AV amplifier of the Profile-A. Since this is an output, the transmission clock of S / PDIF is output at 48 kHz.

  In the case of the advanced BS broadcasting, the audio decoder that the receiving device must have is only MPEG4-AAC 1ch / 2ch / 5.1ch, and the others are optional. Therefore, when broadcasting AAC 22.2ch or MPEG4-ALS audio, AAC 2ch or 5.1ch audio is always broadcast as a simulcast.

  Profile-A AV amplifier cannot handle AAC 22.2ch audio. For this reason, the receiving device (TV) 1 that has recognized that the audio switching to the MPEG4-AAC 22.2ch occurs due to the MPT update, and outputs the AAC 2ch or 5.1ch simultaneous broadcast audio that can be handled by the Profile-A AV amplifier. The search is performed from the broadcast signal, and the sound is output to the S / PDIF with the transmission clock kept at 48 kHz. In this case, since the AV amplifier 2 receives a stream whose mode does not change from MPEG4-AAC 2ch for both the preceding sound and the succeeding sound, the succeeding sound can be output without requiring an 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 sets an audio mode that can be received by the AV amplifier 2 in advance. Although it is not possible to automatically grasp it, it is necessary to output a stream that can reproduce sound to the AV amplifier 2 by registering the "Profile-A connection mode" to the user in advance in the GUI. Can be.

  MPEG2-AAC 22.2ch of this embodiment can be read as MPEG4-ALS 2ch. When handling MPEG4-ALS 5.1ch, a third profile and mode called Profile-C is added.

  The above control processing is performed by the voice selection control unit 13 shown in FIG. FIGS. 8 and 9 show a specific processing procedure in the voice selection control unit 13. FIG.

  FIG. 8 is a flowchart showing the procedure of the voice mode registration setting process. First, in connection with the external AV amplifier 2, it is determined whether or not the connection is through an HDMI cable (step S1). If the connection is not through an HDMI connection (NO), the user selects a profile A to C by GUI display (step S2). Is performed (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 an HDMI cable (step S5). If EDID is available (YES), EDID is obtained (step S6). Then, the physical address of the device is specified from the obtained EDID to determine the applicable 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), a profile that can be supported from the HDMI-CEC command is determined (step S9), and the process proceeds to step S4. Transfer and register the profile.

  FIG. 9 is a flowchart illustrating a procedure of a process after the audio mode registration setting at the time of S / PDIF connection as an example. First, when the MPT is detected during the reception of the audio stream (steps S11 and S12), the registration 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); 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 above clock setting (step S17). If the double speed mode is not set, the sound mode is converted to the 1 × 48 kHz audio mode (step S18). Are output to the S / PDIF in the corresponding audio mode (step S19).

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

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

  Further, even when it is not possible to grasp in advance the audio mode correspondence status of the AV amplifier, the user can select the mode to be output by selecting and inputting the mode using the GUI.

  Next, a part related to the processing of the logo of the first embodiment will be described.

  Note that the logo processing in the transmitting device, the receiving device, and the transmitting / receiving device according to the first embodiment will be described using a CDT based on MPEG-2 TS used in current terrestrial broadcasting and the like for easy understanding. I do.

  When applied to MH-CDT based on TLV (Type Length Value) / MMT (MPEG Media Transport), which is assumed to be adopted in future advanced BS, which is compatible with FIG. This will be described later in the process.

(Logo processing in the first embodiment)
Hereinafter, a transmitting apparatus, a receiving apparatus, a transmitting / receiving apparatus, and a method thereof related to logo processing will be described with reference to FIGS.

  FIG. 10 is a block diagram showing the configuration of the transmission device of the digital television broadcasting system according to the present embodiment. This transmission device inputs, for example, logo data used in a program display field such as an EPG (Electronic Program Guide) and logo management information for managing the logo of the logo data, and a logo data module unit 101 and a CDT, respectively. After passing through a sectioning unit 102, a logo data distribution descriptor generating unit 103, a logo transmission descriptor generating unit 104, and an SDT (Service Definition Table) sectioning unit 105, a multiplexing unit 106 outputs a video signal, an audio signal, It is multiplexed with MPEG-2 TS (Transport Stream) (hereinafter, TS) together with PSI (Program Specific Information), SI (Service Information) other than CDT and SDT, and performs transmission path coding such as error correction coding and modulation. After being performed by the transmission path coding / modulation section 107, the signal is transmitted as a broadcast signal to the service area.

  In the present invention, the transmission line coding / modulation unit 107 is provided after the multiplexing process as a configuration example of a general digital broadcasting transmission device. However, in the case of IPTV, a modulation unit is not required. For IP conversion, transmission path encoding may be performed as necessary for IP transmission.

  Here, in the transmission method of the service logo data of digital television broadcasting, a section format table called CDT (Common Data Table) is used based on the provision of ARIB TR-B14 5.4.1.2, 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, the logo used for broadcasting differs for each broadcasting channel (service). For this reason, a logo identification (hereinafter, logo_id) for identification and management by the receiver is given to each logo data. In addition, the same logo_id is assigned to logo data of multiple types of sizes that have the same design and color, differ in the number of pixels, etc. due to the assumed receiver, its application, audio mode, etc. It is distinguished by the logo type (hereinafter, logo_type). The logo_id is updated and managed by a version number (hereinafter, logo_version).

  The transmitted logo data is sent to the logo data module 101 together with logo_id, logo_type, and logo_version as logo management information. The logo data modularizing section 101 compresses the input logo data and, for each of the logo_id and logo_type, has a data structure defined in FIG. It is stored in an area called the logo data module. This logo data module has a data_size field of 16 bits, but cannot store 64 kbytes of data in the CDT section.

  The information shown in FIG. 11 is defined as follows in ARIB TR-B14 5.9 version 5.4.1.2 Table 5-15.

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

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

  logo_version (logo version number): Describe 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. 0 may be described because the logo indicated by logo_id is no longer used.

data_byte (logo data): The data body of the logo data. "
The logo data module storing the compressed input logo data is sent from logo data module 101 to CDT section 102. The CDT sectioning section 102 distributes the logo data module into a plurality of sections of the CDT and transmits the section to the multiplexing section 106. Here, the CDT has a data structure as shown in FIG. 12 (quoted from Table 5-14 in 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 in FIG. 12 is defined as follows in Table 5-14 of 5.4.1.2 of the ARIB TR-B14 5.9 edition.

“Table_id (table identification): 0xC8 is described.

  section_syntax_indicator (section syntax instruction): 1 is described.

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

  download_data_id (download data identification): used to specify transmitted download data. 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 the SDT.

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

  current_next_indicator (current next instruction): 1 is described.

  section_number (section number): Describes the section number, and sections from 0 to the number indicated by last_section_number exist without omission. In the case of service logo data transmission, logos of each size are transmitted in the section of section_number 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 the transmitted data.

  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 immediately following descriptor loop. If there is no data in the descriptor loop, 0 is described.

data_module_byte () (data module byte): The download data is described by the 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 a logo data distribution descriptor indicating the correspondence between the logo_type and the CDT section to be distributed for each logo data, sends the generated logo data distribution descriptor to the CDT sectioning unit 102, and outputs the CDT descriptor area. To place. In addition, the logo transmission descriptor generation unit 104 sets 0x01 when the CDT transmission method 1 is separately specified in the logo transmission type (logo_transmission_type), and sets the logo data of the logo identification (logo_id) and the logo version number (logo_version). A logo transmission descriptor is generated by adding a download data identification (download_data_id) together with the management information. By setting download_data_id to the same value as download_data_id of CDT, it is possible to specify logo data of CDT transmission corresponding to a certain broadcast channel (service). The SDT sectioning section 105 arranges the logo transmission descriptor in the SDT descriptor area for each service_id specifying the broadcast channel, transmits the logo transmission descriptor to the multiplexing section 106, and performs TS multiplexing together with the CDT section data.

  When the size of data for each logo_type stored in the logo data module is within 4 kbytes of one 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 broadcasts, it may exceed 4 kbytes. Also, in ultra high definition digital broadcasting, if you do not use the logo_type used in terrestrial digital broadcasting that has a small number of pixels, you want to select only a somewhat large type logo and transmit it in any order Is also conceivable. For these reasons, the "logo of each size is transmitted as it is in the section of section_number that matches the" logo_type "value, which is determined by the operation regulations of terrestrial digital broadcasting. "Rule cannot be used. Therefore, in the present embodiment, a logo data distribution descriptor is defined so that transmission in the CDT is possible even in such a case. The data structure of this logo data distribution descriptor is as shown in FIG. 13, for example.

  The logo data module identified by logo_type shall be transmitted after being divided into CDT sections having continuous section numbers, and the first section number shall be described in the start_section_number field, and the number of section divisions for transmitting the logo data module shall be described. Describe in the numbers_of_sections field. For example, suppose that two types of logo_type logo data are transmitted, and that the logo_type of logo_type = 0x05 is section number 0, and that the logo_type of 10,000 byte logo data is tentatively 0x06, for a total of three sections of 4000 bytes, 4000 bytes, and 2000 bytes. It is divided and transmitted in order 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
It may be described.

  Then, the logo data distribution descriptor is arranged and transmitted in the descriptor area of the CDT. The transmission system of these series of logo data is as shown in FIG.

  On the other hand, when 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 changed to the CDT of the service. It is determined that the CDT section has been transmitted, and by referring to the specified download_data_id, first, an arbitrary CDT section concerned is obtained. In this way, by analyzing the logo data distribution descriptor described in the obtained CDT section, it is possible to know which logo_type of logo data is transmitted in which section (group) of which section number. Then, by setting so that the section number of the next necessary logo_type is filtered, the logo data can be efficiently acquired.

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

  Video decoding section 205 decodes the video signal output from TS processing section 204 and outputs the decoded video signal to OSD processing section 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 shown 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 in the receiving device or to the external AV amplifier 2. The AV amplifier 2 is an audio 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 a predetermined OSD process on the video signal output from the video decoding unit 205, for example, a GUI display process from the audio processing unit 206, and outputs the video signal to the display device 3 under the control of the CPU 213. 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 a screen display of an EPG or the like based on the SDT described in the broadcast channel information and 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 an operation input by a user. The operation unit 209 also has the function of the operation input unit 1C shown in FIG. The NVRAM 210 stores various setting information. For example, in the NVRAM 210, a format of a content that can be handled by the broadcast receiving device 2 and the like are stored 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 a 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 expanding the programs stored in the ROM 211 in the work area of the RAM 212 and sequentially executing the programs.

  The module I / F unit 202 is an interface connected to the security module 220 in which encryption key information for conditional access or the like is stored.

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

  Next, a processing operation regarding the logo data of the receiving device, which is 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 the logo data of the desired broadcast channel (service), the presence or absence of a logo transmission descriptor is repeatedly determined from the obtained SDT (step S23), and if the logo transmission descriptor is described in the SDT (YES). It is determined from the logo transmission descriptor whether there is a logo that has not been received yet (step S24). Based on the determination result of step S24, a CDT section of any section_number of the designated service is obtained (step S25), and a logo data distribution descriptor is extracted from the obtained CDT section and analyzed (step S26). Based on the analysis result, the CDT section of section_number for the desired logo_type of the designated service is obtained (step S27), the logo data is obtained from the obtained CDT section (step S28), and a series of processing is ended.

  That is, according to the above processing procedure, it is possible to know which logo_type logo data is transmitted in which section (group) of which section number, so that the setting is performed so that the section number of the next necessary logo_type is filtered. By doing so, the logo data can be obtained 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, in the section-type logo data transmission, the correspondence between the logo type and the transmitted section in the logo data to be transmitted. Since the logo data distribution descriptor indicating the relationship is specified and transmitted, the required number of logo data of the required type is selected independently of the size of the logo data, and efficient in any order. Can be transmitted.

  Note that the logo processing in the transmitting device, the receiving device, and the transmitting / receiving device according to the first embodiment has been described using the CDT based on the MPEG-2 TS employed in the current terrestrial broadcasting and the like. 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), the broadcasting method is the same as that of TLV (Type Length Value) / MMT (MPEG Media Transport) in FIG. And (2) logo processing can be combined and executed 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. As for “MH-”, ARIB STD-B60 “Reference 1 Configuration of control information described in this standard” describes “Tables and descriptors specified in ARIB STD-B10, which have the same function. While the table identifier and descriptor tag value are modified for use in a broadcasting system using MMT, the original table, descriptor, and the like are added by adding "MH-" meaning MPEG-H to the beginning of the name. Distinction. It 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. Is equivalent to the MPEG-2 TS logo transmission descriptor.

  The data structure of the MH-CDT is described in ARIB STD-B60, section 7.3.1.30. 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 set to 16 bits, the essence is not changed at all.

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

(Second Embodiment Processing of Receiving Device When Audio Stream Switches)
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, as a second embodiment, a transmitting apparatus in the case of the TLV / MMT will be described.

  FIG. 16 shows the configuration, in which logo data and logo management information for managing the logo of the logo data are input, and a logo data module unit 21, an MH-CDT section unit 22, and an MH-logo transmission are respectively performed. After passing through a descriptor generation unit 23 and an MH-SDT sectioning unit 24, the MMT multiplexing unit 25 multiplexes the multiplexed signal with a video signal, an audio signal, and the like, and performs error correction coding and the like, which are channel coding, and modulation. After being subjected to the encoding / modulation unit 26, the signal is transmitted as a broadcast signal toward the service area.

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

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

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

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

  The MH-logo transmission descriptor generation unit 23 sets 0x01 when the CDT transmission method 1 is separately specified in the logo transmission type (logo_transmission_type), and sets the logo identification (logo_id) and the logo version number in the logo management information. (Logo_version) and the download data identification (download_data_id) are added to generate the logo transmission descriptor shown in FIG. The download data identification (download_data_id) given by the MH-logo transmission descriptor generation unit 23 is the same id as the download data identification (download_data_id) given 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. Logo data can be specified. Here, the MH-logo transmission descriptor generation unit 23 receives the logo data distribution information from the MH-CDT sectioning unit 22, and extends the content of the logo data distribution information in the MH-logo transmission descriptor shown in FIG. I do.

  The MH-SDT (Service Definition Table) sectioning unit 24 stores the MH-logo transmission descriptor in a descriptor area of the MH-SDT (Service Definition Table) for each service_id specifying the broadcast channel. It is arranged, transmitted to the MMT multiplexing unit 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 instead of newly defining the logo data distribution information as a descriptor and describing it in the descriptor area in the MH-CDT, the MH-SDT is described. MH-Logo transmission descriptor (Table 7-79 MH-Logo transmission descriptor in 7.4.3.34 of ARIB STD-B60 version 1.4). FIG. 17 shows this expansion.

  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 the ARIB STD-B60 1.4 version 7.4.3.34 Table 7-79 MH-Logo transmission descriptor, and the extended portion is the portion surrounded by the line in FIG.

  The information of the extended part in FIG. 17 is as follows.

  logo_type: Indicates the type of logo.

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

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

  Each piece of information other than the expanded part in 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 version 1.4.

  “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 corresponding logo_id (see ARIB STD-B21).

  download_data_id (download data identification): This 16-bit field indicates the identification of data to be downloaded. It matches the value of download_data_id of MH-CDT where the logo data is located (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 transmission device, the reception device, and the transmission / reception device according to the second embodiment, in the logo processing, the required number of types of logo data are selected by a required number without depending on the size of the logo data. Thus, it is possible to transmit data efficiently in any order.

  Further, by extending the MH-SDT and describing the logo data distribution information, the logo data distribution information can be obtained before the MH-CDT is obtained. Therefore, the receiver side first selects one of the MH-CDT sections. In FIG. 15, the step of acquiring the logo data distribution descriptor and confirming the logo data distribution descriptor becomes unnecessary, and the logo data of the required logo_type can be acquired more efficiently.

  Note that the processing of the present embodiment is also applicable to the MPEG-2 TS system of the first embodiment.

(Configuration of Broadcast Receiving Apparatus 1a of Second Embodiment)
As the configuration of the broadcast receiving device 1a according to the second embodiment, the TS processing unit 204 in FIG. 14 is changed to the TLV / MMT separation unit 12. The broadcast receiving apparatus 1a receives a broadcast wave reception signal obtained by a receiving antenna (not shown), performs demodulation processing and error correction decoding processing in a transmission path demodulation / decoding section 201, obtains a TLV stream, and performs TS processing. In place 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 different parts from the second embodiment will be described.

(Third Embodiment Processing of Receiving Device When Audio Stream Switches)
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 the same sending device as the second embodiment. However, the logo data distribution information is not inserted into the MH-logo transmission descriptor. The logo data distribution information is fixedly determined in advance by operation rules, or is 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 digital terrestrial broadcasting. The other two are “small” for display on 4K screens and “large” for display on 8K screens. The number of vertical and horizontal pixels is twice that of “2K”. , Quadrupling. Further, 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 full color of 8 bits each of RGB. For this reason, the upper limit of the logo data size is large.

  The “2K” logo has a maximum size of 1152 bytes, which is the same as the “HD Large” terrestrial digital broadcasting, and can be sent with one MH-CDT, but “Small” has 8000 bytes and “Large” has 16,000 bytes. It is assumed to be the upper limit and cannot be sent by one MH-CDT. For this reason, a new rule for transmitting the logo data by a plurality of MH-CDTs is required.

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

  FIG. 18 shows a processing flow according to the third embodiment. In FIG. 18, the input of the logo data is awaited (step S31). If the input of the logo data is performed, it is determined whether the logo_type indicates 2K, large, or small. The value of the 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 a series of processing ends.

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

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

[Example 1 of Logo Processing of Third Embodiment]
In the logo data module conversion unit 101 shown in FIG. 10, for the syntax of data_module_byte of terrestrial digital broadcasting, the number of bytes of the logo of the corresponding logo_type, that is, the total size of the data divided and put into each section is expressed as “ Add a field called "total_logo_size". An example is shown in FIG. In addition, instead of stipulating that terrestrial digital broadcasts transmit logos of each size in sections with section_number that matches their logo_type value, instead of using a fixed section_number value for each logo_type, use Provision is made in the regulations.

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

  Also, the logo data is divided every 4000 bytes and stored in data_byte. By deciding in this way, the range of section_number of the section acquired to receive the logo of each logo_type can be known in advance without using the information in the received MH-CDT. For example, if you want only a small logo, instead of acquiring all sections with section_numbers from 0 to 6 and determining the logo_type in data_module_byte, instead of determining that sections with section_numbers of 5 and 6 apply, section_number Only sections 5 and 6 need to be acquired.

  In addition, by determining the division size by adding total_logo_size, it is 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 in a large logo, the data_size of the sections with section_numbers 1 to 4 is 4000 bytes, 4000 bytes, 2000 bytes, and 0 bytes, respectively. . Similarly, if the section of section_number = 5 is obtained and the total_logo_size is 4000 bytes or less, it is understood that the section of section_number = 6 is not required to be obtained.

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

  Here, the division size is 4000 bytes as an example, but another value may be used. For example, assuming that the division size is 4070 bytes, a logo whose total_logo_size is 10000 bytes may be divided into 4070 bytes, 4070 bytes, 1860 bytes, and 0 bytes.

  Also, here, as an example, total_logo_size is added to data_module_byte to determine the division size, but information about whether there is a continuation of data_module_byte may be added without determining the division size, and the division size may be determined. Further, other information such as whether or not there is a continuation may be further added.

[Example 2 of Logo Processing of Third Embodiment]
It is not clear in what order the sections are sent in the stream, and while re-setting the section filter to get the next section after getting one section, May be missed, and if one section is acquired and then the next section is acquired, the time until all desired sections are acquired may be long. Also, by setting the section filter at the same time, the acquisition time can be shortened, but the resources of the section filter are consumed much.

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

  This is a function for acquiring a section regardless of whether the value of some bits is 0 or 1. In the section_number mask specification, the bit specified as 0 is 0, the bit specified as 1 is 1, and the bit that may be 0 or 1 is represented by x.

  Large logos have a maximum of 4 sections and small logos have a maximum of 2 sections. It is efficient to mask with 2 bits for large logos and 1 bit for small logos. Therefore, the mask specification of the section_number of the large logo is 000001xx (00000100, 00000101, 00000110, 00000111), and the mask specification of the section_number of the small logo is 0000001x (00000010, 00000011).

In this case, the section_number value to be used is small 2-3
Large 4-7
Becomes

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

  Normally, section_number is arranged without omission from 0 to last_section_number, but in EIT [schedule] (and MH-EIT [schedule]), an operation in which a section in the middle may be omitted as an exception. Therefore, if the MH-CDT is stipulated to perform the exceptional operation of not transmitting the section of section_number = 1, logo data of each logo_type can be transmitted in seven sections with section_numbers of 0 and 2 to 7. .

  Here, section_number = 1 is set as an unnecessary section as an example. However, section_number = 0 may be set as an unnecessary section, and logo data of each logo_type may be transmitted in seven sections having section_numbers 1 to 7.

[Example 3 of Logo Processing of Third Embodiment]
In the case of specifying the same mask as in the second embodiment, if it is possible to indicate that the data is invalid, this can be realized without performing exceptional operation such as not sending a section in the middle.

  For example, this can be realized by deciding not to use the value of 0xFF as logo_type in the future and determining that the data is invalid if the value of logo_type of data_module_byte is 0xFF. In the case of a receiver that acquires only the section of the necessary section_number, this section is not acquired, so there is no effect on the processing. In the case of a receiver that acquires all section_number sections using the section filter mask function, it is only necessary to determine that the data is invalid data and discard it.

[Example 4 of Logo Processing of Third Embodiment]
Alternatively, when a mask is specified in the same manner as in the second embodiment, one section may not be used for transmitting the logo data itself but may be used for transmitting other information.

  The 2K logo is transmitted with section_number = 1, section_number = 0 is used to transmit other information, section_number = 0 is used for special data, and section_number 1 to 7 can be used for transmitting logo data. it can.

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

[Example 5 of Logo Processing of 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 is obtained after section_number = 0 is obtained. By taking the two steps of acquiring the section, the service logo of the desired logo_type can be acquired. Although the time required to obtain a desired logo may be lengthened by performing the two steps, it is possible to cope with a case where a new logo_type is added in the future.

  When the range of section_number is not fixed by the operation rule, 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, by changing the definition of data_module_byte and the allocation rule of section_number, a new data structure that is not MH-CDT, Alternatively, a new descriptor to be inserted into the MH-CDT is additionally 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.

  Also, in Examples 1 to 4 of the logo processing of the third embodiment, it is possible to acquire only the section of section_number of the desired logo_type, as in the case of digital terrestrial broadcasting. In Examples 2 to 4 of the logo processing according to the third embodiment, by setting a section filter by masking the section_number, it is possible to efficiently acquire a large logo and a small logo. . Further, in Example 5 of the logo processing of the third embodiment, it is possible to cope with a case where a new logo_type is 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 a logo transmission descriptor and an MH-logo transmission descriptor are referred to. It is generically called a logo transmission descriptor.

  Although some embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and their equivalents. Further, “broadcast” in the present specification includes “IP broadcast” using the Internet protocol.

(1) Digital television capable of multiplexing and transmitting an arbitrary number of different types of logo data for one logo identification in a plurality of sections of the common data table information, in a size exceeding the data amount that can be transmitted in one section of the common data table information. A broadcast system,
By the modularization unit, the logo data is identified by the logo, and modularized for each type of logo,
The first sectioning unit distributes and outputs 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. Generating and outputting logo data distribution information indicating the correspondence between the type of the section and the section to be distributed,
A second sectioning unit for transmitting a logo transmission descriptor from the logo identification and the 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; Generate information and insert it into the service description table information,
A multiplexing unit that transmits 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;
Receiving the broadcast signal, acquiring the service description table information, extracting the logo transmission descriptor information from the acquired service description table information, and extracting the logo transmission information, logo management information, and logo data distribution information; Acquisition, logo identification, logo type 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 transmission / reception device comprising: a receiving system that acquires logo data for each of the devices.

(2) Digital television capable of multiplexing and transmitting an arbitrary number of different types of logo data for one logo identification in a plurality of sections of the common data table information with a size exceeding the amount of data that can be transmitted in one section of the common data table information. Used in broadcast systems,
A modularization unit for modularizing the logo data for each of the logo identification and logo types;
The logo data modularized by the modularization unit is distributed and output to a plurality of sections of the common data table information having the same download data identification, and the logo data and the distributed section are provided for the logo data. A first sectioning unit for generating and outputting logo data distribution information indicating a correspondence relationship with
Generating a logo transmission descriptor information from a logo identification and a 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 unit to be inserted into the table information;
A transmitting 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 multiplex transmission of an arbitrary number of different types of logo data for one logo identification with a size exceeding the data amount that can be transmitted in one section of the common data table information;
By the modularization unit, the logo data is identified by the logo, and modularized for each type of logo,
The first sectioning unit distributes and outputs 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. Generating and outputting logo data distribution information indicating the correspondence between the type of the section and the section to be distributed,
A second sectioning unit for transmitting a logo transmission descriptor from the logo identification and the 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; Generate information and insert it into the service description table information,
The multiplexing unit 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. Receiving device,
A receiving unit that receives the broadcast signal,
The service description table information is obtained from the broadcast signal received by the receiving unit, the logo transmission descriptor information is extracted from the obtained service description table information, and the logo transmission information, the logo management information, and the logo data distribution are obtained. Information and 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 device comprising:

  Although the above-described first to third embodiments have been described as examples in which the present invention is applied to transmission of service logo data such as a logo mark used in a program column, the present invention transmits other image data. It may be applied to doing.

  1, 1a: broadcast receiving device, 1A: video processing unit, 1B: GUI display unit, 1C: operation input unit, 2: AV amplifier, 3: display device, 11: transmission line demodulation / decoding unit, 12: TLV / MMT Separation unit, 13 ... Sound selection control unit, 14 ... Decoder, 15 ... DMIX unit, 16 ... Switching unit, 17 ... DAC, 18 ... Sound output unit, 19 ... External output interface, 21 ... Logo data module unit, 22 ... MH-CDT sectioning unit, 23: MH-logo transmission descriptor generating unit, 24: MH-SDT sectioning unit, 25: MMT multiplexing unit, 26: transmission line encoding / modulation unit, 101: logo data module Unit 102: CDT sectioning unit 103: logo data distribution descriptor generating unit 104: logo transmission descriptor generating unit 105: SDT sectioning unit 106: multiplexing unit 107 Transmission line coding / modulation unit, 201: Transmission line demodulation / decoding unit, 202: Module I / F unit, 203: Section processing unit, 204: TS processing unit, 205: Video decoding unit, 206: Audio processing unit, 207 ... OSD processing unit, 208 communication I / F unit, 209 operation unit, 210 NVRAM, 211 ROM, 212 RAM, 213 CPU, 214 descrambler, 215 storage unit, 216 bus.

Claims (1)

A receiving device for acquiring the logo data transmitted from a transmitting device that transmits logo data indicating a logo by a TLV (Type Length Value) stream,
The logo data is prepared for each pixel number,
The logo data by pixel number is identified by the logo type,
The description content of 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 describing 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;
Logotype,
A start section number indicating the first section number for dividing and transmitting the logo data of the logo type;
Transmission section number indicating the number of sections transmitting the logo data of the logotype, and
The logo data identified by the logo type is assigned to a section having a continuous section number by the transmitting device,
The plurality of logo data of different logo types are continuously assigned to sections starting from section number 0 by the transmitting device,
The logo data of the first pixel number is assigned to the section of section number 0 by the transmission device,
The logo data having a second pixel number larger than the first pixel number is assigned to a plurality of sections starting from section number 1 by the transmission device,
The logo transmission descriptor arranged in the descriptor area of the service description table is multiplexed with the data of the section,
The multiplexed signal is error-correction-coded, modulated, and transmitted by the transmitting device,
A receiving device for acquiring 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.

Images