JP6522810B2 - Transmission / reception system - Google Patents

Description

  The present invention relates to a transmitting and receiving system.

  MPEG4-AAC (Moving Picture Experts Group 4-Advanced Audio Coding) (1ch, 2ch, 5.1ch, 7.1ch, 22.2ch) as a profile of Audio Stream in a digital television broadcasting system in advanced BS / highband CS broadcast. Adoption of MPEG4 ALS (Moving Picture Experts Group 4-Audio Lossless Coding) (2 ch, 5.1 ch) is planned. As a means for outputting these Audio Streams from the receiving apparatus to an external audio device (including an AV amplifier, a sound bar, etc.), an optical cable / coaxial cable compliant with S / PDIF (Sony Philips Digital Interface) standard, or HDMI ( Registered trademark) -Forum (High-Definition Multimedia Interface-Forum) transmission using an HDMI cable standardized. In either case, the transmission system of signals is standardized by IEC61937.

  However, the bit rate of Audio Stream that can be transmitted by the current S / PDIF standard is up to about 1.5 Mbps, and in the case of MPEG4-AAC, transmission can be performed by the current S / PDIF standard up to 7.1 ch. However, with the 22.2 ch, the bit rate is too low to transmit. For this reason, the IEC 61937 has been revised, and studies are underway to double the clock frequency during transmission to extend the transmission rate to about 3 Mbps. Furthermore, in the case of 5.1ch of MPEG4-ALS, since the maximum bit rate of the stream is approximately 7.3 Mbps, studies are also underway to support the transmission clock frequency up to 8x so that it can be transmitted.

  Also, at present, in digital television broadcasting, video signals of HDTV (High Definition Television) with 1920 or 1440 horizontal pixels and 1080 vertical pixels are mainly used, but still higher definition video distribution Came to be required. For this reason, standardization of ultra-high definition television broadcast by 4K with 4 × (3840 × 2160) screen pixels and 8K UHDTV (Ultra High Definition Television) with 16 × (7680 × 4320) compared to HDTV is available. It is in progress.

  By the way, in the current terrestrial digital television broadcasting, a section format table called CDT (Common Data Table) is applied to the transmission of service logo data such as logos used in the program section. In section 5.4 of ARIB TR-B14 5.9, first edition, in the transmission of the CDT method, “sections from 0 to the number indicated by last_section_number are present without omission. For service logo data transmission, , And transmit the logo of each size in the section of section_number that matches the logo_type value. " This means that when transmitting logo data having a value of logo_type, all types of logo data from 0 to the value of logo_type should be transmitted in one section (one section per logo) without failure. means.

ARIB STD-B 63 1.1 version revised on March 17, 2015, Radio Industries Association of Japan ARIB STD-B60 1.4 version September 30, 2015 formulated by MMT in digital broadcasting for the digital broadcasting industry, Japan Radio Industry Association "Terrestrial digital television broadcasting operation regulations" ARIB TR-B14 version 5.9 July 3, 2015 revised First edition

  An object of this embodiment is to provide a broadcasting system and its transmitting apparatus and receiving apparatus, which solve the problems occurring in a digital television broadcasting system when performing advanced BS / high-bandwidth CS broadcasting.

The transmitting / receiving system according to the embodiment transmits the logo data indicating the logo from the transmitting device and the receiving device that transmit the TLV stream in a section format table CDT (Common Data Table) based on TLV (Type Length Value) / MMT (MPEG Media Transport) Become.

In this transmission / reception system,
The logo data is prepared for each pixel number,
The contents of the logo transmission descriptor placed in the descriptor area of the service description table transmitted by the TLV stream change according to the logo transmission type,
If the logo transmission type of the logo transmission descriptor is 0x01, the logo transmission descriptor is
Logo identification that describes the ID of 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;
A logo type for identifying the logo data according to the number of pixels;
The start section number representing the first section number for dividing and transmitting the logo data of the logo type, and
The number of transmission sections representing the number of sections transmitting logo data of the logotype
Including
After the logo identification is the logo version number,
The download data identification follows the logo version number,
After the download data identification, there is the logotype,
After the logotype is the starting section number,
After the start section number is the number of transmission sections,
The transmitting device is
If the size of the logo data of one logo type exceeds the size that can be transmitted in one section, the logo data identified by the logo type is assigned to the CDT section with a consecutive section number
Assign multiple logo data of different logotypes sequentially to the CDT section starting from section number 0,
Assign logo data of the first pixel number to the CDT section of section number 0,
Assign logo data of the second pixel number having a pixel number larger than the first pixel number to a plurality of CDT sections starting from the section number 1,
Multiplexing a service description table including the logo transmission descriptor with a CDT composed of data of the CDT section to generate a multiplexed signal ;
Error correction coding, modulation and transmission of the multiplexed signal,
The receiving apparatus acquires the logo data based on the start section number and the number of transmission sections included in the logo transmission descriptor disposed in the descriptor area of the service description table transmitted by the TLV stream. Transmission and reception system.

FIG. 2 is a block diagram showing the configuration of a broadcast reception apparatus in advanced BS / high-bandwidth CS broadcasting according to processing when an 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 receiving apparatus shown in FIG. 1 and an AV amplifier are connected. The figure which shows operation | movement at the time of receiving the broadcast which an audio | voice asset (audio | voice mode) changes from AAC 2ch to ALS 2ch in the broadcast receiving apparatus and external AV amplifier in a conventional system. The figure which shows operation | movement at the time of receiving the broadcast which audio | voice mode changes from MPEG4-AAC 2ch to MPEG4-AAC 5.1ch in the broadcast receiving apparatus and external AV amplifier in a conventional system. The figure which shows operation | movement at the time of receiving the broadcast in which the audio mode changes from MPEG4-AAC 2ch to MPEG4-AAC 22.2ch in the broadcast receiving apparatus and external AV amplifier in a conventional system. FIG. 7 is a diagram showing an operation when receiving a broadcast that changes from AAC 2 ch to AAC 22.2 ch when the profile is in the B connection mode in the broadcast receiving apparatus shown in FIG. 1. FIG. 7 is a diagram showing an operation when receiving a broadcast that changes from AAC 2 ch to AAC 22.2 ch when the profile is in the A connection mode in the broadcast receiving apparatus shown in FIG. 1. The flowchart for demonstrating the prior mode setting of a profile in the broadcast receiving apparatus shown in FIG. The flowchart for demonstrating the switching process at the time of broadcast reception in the broadcast receiving apparatus shown in FIG. FIG. 2 is a block diagram showing the configuration of a transmission device of the digital television broadcast system according to the logo processing of the first embodiment. The figure for demonstrating the area | region which stores the process result of the logo data modularization part of the transmitter shown in FIG. The figure which shows the data structure of CDT used in the CDT sectioning part of the transmitter shown in FIG. The figure which shows the data structure of the logo data distribution descriptor of the transmitter shown in FIG. FIG. 2 is a block diagram showing the configuration of a receiver of the digital television broadcast system related to logo processing of the first embodiment. FIG. 15 is a flowchart for explaining processing operation regarding logo data of the receiving device shown in FIG. 14; FIG. FIG. 8 is a block diagram showing the configuration of a transmitter of a digital television broadcast system of the second and third embodiments. The figure which shows the data structure which expanded MH-logo transmission descriptor in the transmitter shown in FIG. The flowchart for demonstrating the processing operation of the transmitter of the digital television broadcasting system which concerns on 3rd Embodiment. FIG. 19 is a view showing a data structure regarding data_module_byte of the processing operation shown in FIG. 18; FIG. 19 is a view showing another data structure regarding data_module_byte of the processing operation shown in FIG. 18;

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

  The transmitting / receiving apparatus of the embodiment can multiplex transmission of any number of different types of logo data per type of logo identification in a plurality of sections of common data table information with a size exceeding the amount of data that can be sent in one section of common data table information. Transmitter and receiver.

  The transmitting apparatus of the embodiment can multiplex transmission of any number of different types of logo data per type of logo identification in a plurality of sections of common data table information with a size exceeding the amount of data that can be sent in one section of common data table information. Transmission device used in the transmission / reception system.

  The receiving apparatus according to the embodiment is capable of multiplex transmission of an arbitrary number of different types of logo data per type of logo identification in a plurality of sections of common data table information with a size exceeding the amount of data that can be sent in one section of common data table information. Receiver used in the transmission / reception system.

  In the case where the double mode and the double mode of the transmission clock are defined in the above IEC 61937, according to the standard, it is possible to manufacture a broadcast receiving apparatus and an audio apparatus capable of transmitting up to MPEG4-ALS 5.1 ch. However, in order to operate the transmission clock at 2 × speed or 8 × speed, it is necessary to adopt a dedicated part or the like, which increases the cost of the product.

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

  That is, in a broadcast receiving apparatus that receives a broadcast in which the first audio signal and the second audio signal are selectively transmitted, and outputs the received audio signal to an externally connected audio device, the broadcast receiving device with the externally connected audio device Between the first transmission clock frequency and the second transmission clock frequency as the transmission clock frequency of the audio signal transmission between them, and the first audio signal can be transmitted at both the first transmission clock frequency and the second transmission clock frequency 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 the audio device not compatible with the second transmission clock frequency. The problem is that there is no sound.

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

  According to the embodiment, there are the first transmission clock frequency and the second transmission clock frequency as the transmission clock frequency of the audio signal transmission with the externally connected audio device, and the first audio signal is the first transmission clock. A form suitable for the corresponding transmission clock frequency of the connected audio device, if it is possible to transmit on both the frequency and the second transmission clock frequency and the second audio signal can be transmitted only on the second transmission clock frequency A broadcast system, a broadcast transmission apparatus, a broadcast reception apparatus, a broadcast transmission / reception method, a broadcast transmission method and a broadcast reception method capable of outputting an audio signal received in Ru.

  Also, for example, in the above-described transmission method of logo data in digital television broadcasting, it is impossible to transmit logo data of a size exceeding one section, in other words, of a size that spans multiple sections. There is a problem that it is not possible to select and transmit only logo data of required value logo_type. For this reason, the extensibility, flexibility, transmission efficiency, etc. of logo data operation are lost in ultra-high definition of digital television broadcasting.

  According to the embodiment, there is also provided a broadcast system capable of extending the operation of logo data and improving flexibility, transmission efficiency, and the like in ultra-high definition of video, and a transmitter and a receiver thereof.

First Embodiment
The transmission apparatus, the reception apparatus, the transmission / reception apparatus and the method thereof according to the first embodiment will be described below with reference to FIGS. 1 to 15.

  The first embodiment is roughly divided into processing at the time of audio stream switching, and a part related to logo processing, but the present invention does not necessarily require both processings, and either processing Even alone can be an invention.

First Embodiment Processing of the Receiving Device When Switching Audio Streams
First, processing when the audio stream of the first embodiment is switched will be described.

  Hereinafter, with reference to FIG. 1 to FIG. 9, the process of the receiving apparatus and the method thereof when the audio stream is switched will be described.

  FIG. 1 is a block diagram showing the configuration of a broadcast receiving apparatus 1 in advanced BS / altitude wideband CS broadcasting as a first embodiment. This broadcast receiving apparatus receives a received signal of a broadcast wave obtained by a receiving antenna (not shown), and performs demodulation processing and error correction decoding processing in the transmission path demodulation / decoding unit 11 to obtain a TLV stream, and this TLV The TLV / MMT separation unit 12 separates the video stream and the audio stream from the stream.

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

  In the internal reproduction system, the decoder 14 decodes the selected audio asset, and if the decoded output is 5.1 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 PCM data of 2ch, it will send to the switching part 16 directly. The switching unit 16 selects either 2ch from the down mixer unit 15 at the input or 2ch directly supplied from the decoder 14 based on the instruction from the audio selection control unit 13 and outputs at the output an internal reproduction system, an external Select one of the output systems.

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

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

  On the other hand, the video stream obtained by the transmission path demodulation / decoding unit 11 is sent to the video processing unit 1A. The video processing unit 1A generates a video signal of a predetermined resolution from the input video stream and sends it to the display device 3 for display. Here, when the corresponding audio mode of the connected AV amplifier 2 can not be registered and set, the audio selection control unit 13 causes the GUI (Graphical User Interface) display unit 1B to perform a display for prompting an input operation of the mode selection. Send instructions to do. In response to the instruction, the GUI display unit 1B causes the display device 3 to display an input operation screen for mode selection through the video processing unit 1A. The user views the screen and performs an operation of selecting the corresponding audio mode of the AV amplifier 2 to the operation input unit 1C, thereby registering and setting the corresponding audio mode of the connected AV amplifier 2 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 apparatus 1 and transmitting an audio asset. In FIG. 2, the connection between the receiving device 1 and the external AV amplifier 2 is made by any one of an HDMI cable, an S / PDIF optical digital cable, and an S / PDIF coaxial digital cable.

  First, when the receiving device 1 is in the form of a set top box (STB), the HDMI output terminal of the receiving device 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, in the case where the receiving device 1 is in the form of a television, the HDMI output terminal of the external AV amplifier 2 and the HDMI output terminal of the external AV amplifier 2 are input for the purpose of inputting the video and audio signals The HDMI input terminal of the receiving apparatus (TV) 1 is connected by an HDMI cable. In this case, by using the function (HDMI-ARC: audio return channel) for transmitting only the audio signal in the direction from the receiving device (television) 1 to the external AV amplifier 2 on the HDMI cable, the audio of the receiving device (television) A signal can be sent to the external AV amplifier 2. Note that the receiver 1 in the form of a television may be equipped with an HDMI output terminal, and may be equipped with a function of transmitting video and audio signals to the HDMI input terminal of the external AV amplifier 2.

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

  Here, in the case of 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 a broadcast including a plurality of audio assets is received, the receiving device 1 selects and outputs one audio asset to be output to the external AV amplifier 2.

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

As shown in FIG. 2, the receiving apparatus 1 receives a broadcast wave (TLV stream) including a plurality of audio streams (maximum number of audio assets 4). For example, in the advanced wideband CS broadcast, seven types of voice modes can be operated (in the advanced BS digital broadcast, six types are used because the operation of AAC 1.0 ch is not performed). Among them, when broadcasting audio modes other than the three AAC 1.0 ch (not used in advanced BS), AAC 2.0 ch, and AAC 5.1 ch, which requires the receiving device 1 to be reproduced independently, are simultaneous. Audio is broadcast simultaneously. Table 1 shows a combination example of the voice mode and the simultaneous voice in broadcasting.

  The receiving device 1 selects one of the plurality of audio assets to be output and outputs the selected asset to the external AV amplifier 2. The asset to be output may be selected automatically if the user arbitrarily selects it, or if the audio mode compatible with the external AV amplifier 2 is known (previously set on the receiving device 1 side). In this case, as in the case of reproduction in the main body of the reception device 1, an asset with a small component tag value is prioritized. In addition, a function may be provided to decode the audio stream in the receiving device 1 and output the audio stream to the external AV amplifier 2 by linear PCM.

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

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

First, the system of stream output to S / PDIF and HDMI is defined by IEC60958 and IEC61937. In the case of outputting each voice mode operated in advanced BS broadcast and advanced wideband CS broadcast, it is output according to the definition of Table 2 respectively.

  When transmitting AAC 22.2 ch and ALS audio, the bit rate of the signal exceeds the transmittable range at the 48 kHz IEC 609 58 frame rate, so it is necessary to extend the frame rate to double speed or more. Currently, we are preparing for the revision of IEC60958 and IEC61937 corresponding to this.

  As an operation example when outputting a broadcast in which the audio mode changes to the external AV amplifier 2, the receiving device 1 and the external AV amplifier 2 in receiving a broadcast in which the audio mode changes from MPEG4-AAC 2 ch to MPEG 4-ALS 2 ch The operation of is shown in FIG.

  The receiving device 1 receives the asset of AAC 2ch which is the preceding voice (FIG. 3 (a)), and outputs it to the S / PDIF at a frame rate of 48 kHz (FIG. 3 (b)). The external AV amplifier 2 receives this stream, decodes it, and outputs it to the speaker (FIG. 3 (c)). In this state, when the preceding voice asset of the broadcast is stopped (FIG. 3 (a)), the receiving device 1 outputs the NULL data stream to S / PDIF for 50 msec or more according to IEC 60958-1 (FIG. 3 (b)). / Stop output to PDIF. The external AV amplifier 2 discharges the audio stream accumulated in the buffer by this NULL data stream.

  When the receiving device 1 receives the ALS 2ch asset that is the subsequent voice (FIG. 3 (a)), the receiving device 1 changes the S / PDIF frame rate to 96 kHz and outputs the ALS 2ch stream (FIG. b). The external AV amplifier 2 having received such a stream changing on the S / PDIF performs resynchronization processing by the PLL circuit with respect to the change of the frame rate. Thereafter, format detection of the audio stream and switching from AAC to ALS of the audio decoder are performed, and the delay time of the ALS decoding is passed, and the subsequent audio is output from the speaker (FIG. 3 (c)).

  Furthermore, in FIG. 4 and FIG. 5, when the stream in which the audio mode changes in the middle is broadcast in the advanced BS / high-bandwidth CS digital broadcast, the change of the audio mode in the broadcast signal and the S / PDIF from the receiver 1 And the audio data output from the AV amplifier 2.

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

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

  The AV amplifier 2 receiving such a signal from the S / PDIF outputs the AAC 2ch audio to the speaker while the AAC 2ch audio is being input, and stops the audio output when it enters the no audio section, Next, when an audio signal is input, processing is performed to detect what the audio is, and when it is determined that the AAC is 5.1ch, output is performed to the speaker.

  On the other hand, FIG. 5 shows the case where the audio mode changes from MPEG4-AAC 2 ch to MPEG 4-AAC 22.2 ch. The difference from the case of FIG. 4 is that the MPEG4-AAC 22.2ch can not transmit at a bit rate of 48 kHz for the S / PDIF transmission clock, and the transmission clock needs to be switched to 96 kHz (double speed). .

  The receiving device 1 which has grasped the change of the audio mode by updating the MPT stops the S / PDIF AAC 2ch audio output when knowing that the subsequent audio is MPEG4-AAC 22.2ch which needs transmission at 96 kHz. After that, the output of the 48 kHz transmission clock is also stopped. Thereafter, the voiceless data of the transmission clock of 96 kHz is outputted to the S / PDIF, and when the 22.2 ch voice stream is received, the voice is outputted to the S / PDIF.

  The AV amplifier 2 receiving such a signal from the S / PDIF is synchronized with the receiver 1 at a frequency of 96 kHz by the PLL when the signal of the transmission clock of 96 kHz is received after the signal of AAC 2 ch 48 kHz is disconnected. I do. After the time required for this synchronization (about 200 msec) has elapsed, an audio signal is received, and after knowing that it is AAC 22.2 ch, sound is output to the speaker. As described above, when voice mode changes with different transmission clocks occur, there is a problem that the time required for sound output becomes long. As shown in FIG. 3, the audio mode switching from the MPEG4-AAC 2 ch to the MPEG4-ALS also causes switching with different transmission clock frequencies, so the same problem occurs.

As described in the problem, in the advanced BS broadcasting, the voice mode is expanded. As a result, at the transmission clock frequency defined by the conventional S / PDIF standard, there is a voice mode in which the transmission rate is insufficient and transmission can not be performed. For this reason, S / PDIF standard revision work is performed to extend the S / PDIF standard and enable high-speed transmission. Table 3 shows the relationship between the voice mode and the transmission clock frequency in S / PDIF.

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

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

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

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

  In 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 performs sound output with the built-in speaker, the receiving device (TV) 1 first outputs the audio on the preceding side if the switching of the audio mode is known in advance by updating the MPT. To mute the switch, change the setting of the decoder to match the audio mode to the subsequent audio stream, and perform the subsequent audio output 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 the sound is output to the speaker via the AV amplifier 2, as shown in FIG. Output MPEG4-AAC 2ch) to S / PDIF. When switching of the voice mode is detected by the MPT update, the output of the preceding voice to the S / PDIF is stopped. However, the S / PDIF transmission clock continues to be at 48 kHz. When the subsequent voice (MPEG4-AAC 5.1 ch) is received, the receiver (TV) 1 outputs the stream of the subsequent voice to the S / PDIF.

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

  The above example describes the case where the S / PDIF transmission clock frequency changes within the range of transmittable audio modes at 48 kHz, that is, the change from MPEG4-AAC 2ch to MPEG4-AAC 5.1ch. . FIG. 5 shows audio mode switching that requires switching from different transmission clock frequencies, such as MPEG4-AAC 2 ch to MPEG 4-AAC 22.2 ch.

  The receiver (TV) 1 that has received the voice of MPEG4-AAC2ch that is the preceding voice transmits the stream of AAC2ch at a transmission clock frequency of 48 kHz when outputting the audio stream to the S / PDIF. The receiving apparatus (TV) 1 which has grasped that the subsequent audio is MPEG4-AAC 22.2 ch by the update of the MPT first stops the transmission of the preceding audio. Next, since the subsequent voice is a voice mode that can not be transmitted without a clock of 96 kHz, the transmission clock of 48 kHz is also stopped, and then the transmission clock of 96 kHz is output. After that, when the subsequent audio is received, the audio stream of MPEG4-AAC 22.2 ch is transmitted with a clock of 96 kHz.

  On the other hand, from the viewpoint of the AV amplifier 2 that receives this audio stream, the audio stream is first stopped while the audio of MPEG4-AAC 2ch 48 kHz which is the preceding audio 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, synchronization processing of the transmission clocks of the receiver (TV) 1 and the AV amplifier 2 is performed by the PLL circuit.

  When the communication channel between the receiving device (TV) 1 and the AV amplifier 2 can be synchronized, the audio stream can be received again via the S / PDIF, the audio mode of the received audio stream is detected, and to the speaker The operation of emitting the sound of is performed. It is assumed that the time taken for the synchronization process by this PLL (PLL lock time) takes a relatively long time of about 200 msec. Therefore, there arises a problem that the leading portion of the subsequent voice is missing.

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

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

  On the other hand, when the connection between the receiving apparatus (TV) 1 and the AV amplifier 2 is an S / PDIF optical cable or a coaxial cable, the receiving apparatus (TV) 1 can not obtain information on the AV amplifier 2. Therefore, a menu for inputting “profile of connected AV amplifier” is created by the GUI of the receiving device (TV) 1, and the user is made to input.

  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 The audio stream output to S / PDIF is as shown in FIG. 6 and FIG. 6 and 7 show signals output from the receiver (TV) 1 for each mode to the S / PDIF when a broadcast in which an audio stream changes from MPEG4-AAC 2 ch to MPEG 4-AAC 22.2 ch is received. FIG.

  FIG. 6 is a diagram when a Profile-B AV amplifier capable of handling AAC 22.2 ch is connected. The receiver (TV) 1 set to “Profile-B connection mode” is 96 kHz even if it is an AAC 2 channel stream that is originally sufficient for 48 kHz when outputting MPEG 4 AAC 2 channel audio to S / PDIF. Output to S / PDIF. Thereafter, even if audio switching to MPEG4-AAC 22.2 ch occurs, it is possible to switch only the audio stream with the transmission clock remaining at 96 kHz. As a result, the PLL lock time as shown in FIG. 5 is not necessary, and it is possible to reduce the loss of sound at the point of switching from AAC 2 ch to 22.2 ch.

  On the other hand, FIG. 7 is a diagram when the Profile-A AV amplifier which can not handle MPEG4-AAC 22.2 ch is connected. The receiver (TV) 1 set in “Profile-A connection mode” can not use any clock other than 48 kHz when outputting MPEG4-AAC 2ch audio to S / PDIF. Since it is an output, the transmission clock of S / PDIF is set to 48 kHz and output.

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

  The Profile-A AV amplifier can not handle AAC 22.2ch audio. For this reason, the receiver (TV) 1 that recognizes that audio switching to MPEG4-AAC 22.2 ch occurs due to MPT update is simultaneous broadcast audio of AAC 2 ch or 5.1 ch that can be handled by the AV amplifier of Profile-A. The broadcast signal is searched, and the voice 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 in which the mode does not change with both the preceding voice and the subsequent voice as in MPEG4-AAC 2ch, the subsequent voice can be output without requiring the voice mode detection time.

  As described above, when the connection between the receiving apparatus (TV) 1 and the AV amplifier 2 is an S / PDIF optical cable or a coaxial cable, the receiving apparatus (TV) 1 can advance in advance the audio mode that can be received by the AV amplifier 2. Although it is not possible to automatically understand, it is necessary to output to the AV amplifier 2 a stream from which sound can be reproduced by allowing the user to register in advance in the GUI that "Profile-A connection mode" is set. Can.

  The MPEG4-AAC 22.2 ch of this embodiment can be read as the MPEG 4-ALS 2 ch. When handling MPEG4-ALS 5.1ch, a third profile and mode called Profile-C will be added.

  The above control process is performed by the voice selection control unit 13 shown in FIG. Specific processing procedures in the voice selection control unit 13 are shown in FIG. 8 and FIG.

  FIG. 8 is a flowchart showing the procedure of the voice mode registration setting process. First, in the connection of the external AV amplifier 2, it is judged whether or not it is a connection by the HDMI cable (step S1), and if it is the HDMI connection (NO), the user selects the profiles A to C by the 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 the EDID is available through the HDMI cable (step S5), and if the EDID is available (YES), the EDID is obtained (step S6) The physical address of the device is specified from the acquired EDID to determine a compatible profile (step S7), and the process proceeds to step S4 to register and set the profile.

  In step S5, if the EDID is not obtained (NO), an HDMI-CEC command is obtained (step S8), and a compatible profile is determined from this HDMI-CEC command (step S9), and in step S4. Migrate and register the profile.

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

  Here, it is judged whether the double speed mode (96 kHz, 384 kHz) is selected in the above clock setting (step S17), and if it is not double speed mode, it is converted to voice mode of 1 double speed 48 kHz (step S18). To the S / PDIF in the corresponding voice 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, the connection is made when the non-double-speed mode voice and the double-speed mode voice are mixed and broadcast. When the audio device does not correspond to the audio mode of the profile in the double-speed mode, it can be converted to audio in the non-double-speed mode and output when switched to audio in the double-speed mode.

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

  In addition, even when it is not possible to grasp in advance the audio mode correspondence situation in the AV amplifier, the user can select the audio to be output by designating and inputting the mode by the GUI.

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

  In addition, in the logo processing in the transmission device, the reception device, and the transmission / reception device according to the first embodiment, the explanation will be made using the CDT based on the MPEG-2 TS adopted in the current terrestrial broadcasting etc. for easy understanding. Do.

  In the case of applying to MH-CDT based on TLV (Type Length Value) / MMT (MPEG Media Transport) assumed to be adopted in future advanced BSs compatible with FIG. 1, the logo of the first embodiment is used. The latter half of the process will be described.

(Processing of logo in the first embodiment)
Hereinafter, the transmitting device, the receiving device, the transmitting and receiving device, and the method thereof regarding the processing of the logo will be described with reference to FIGS.

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

  In the present invention, although the transmission path coding / modulation unit 107 is provided after multiplexing processing as a typical configuration example of a transmitting apparatus for digital broadcasting, in the case of IPTV, no modulation unit is necessary, and a transmission line code The transmission channel may be encoded as necessary for IP transmission.

  Here, in the transmission system of service logo data of digital television broadcasting, a table of section format called CDT (Common Data Table) is used based on the provision of 5.4.1.2 of ARIB TR-B14, and the type of logo ( 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 broadcast channel (service). For this reason, 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 given to logo data of a plurality of types of sizes that have the same design and color, and differ in the number of pixels, etc. depending on the intended receiver and its application, voice mode, etc. It is distinguished by logo type (hereinafter, logo_type). Also, logo_id is updated and managed with a version number (hereinafter, logo_version).

  The transmitted logo data is sent to the logo data modularization unit 101 together with logo management information, logo_id, logo_type, and logo_version. This logo data modularization unit 101 compresses the input logo data, and for each of logo_id and logo_type, the data structure of the data structure specified in FIG. 11 (cited from Table 5-15 of 5.4.1.2 of ARIB TR-B 14 5.9) Store in an area called logo data module. This logo data module has 16 bits of data_size field, but can not store 64 kbytes of data in the CDT section.

  The information in FIG. 11 is defined as follows in Table 5-15 of 5.4.1.2 in ARIB TR-B 14 5.9.

“Logo_type (logotype): Indicates the type of logo, logo_type is shown in Table 4-1. This value is transmitted in accordance with the CDT section_number value.

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

  logo_version (logo version number): Describe the version number of the relevant 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 subsequent logo data bytes. 0 may be described for reasons such as the use of the logo indicated by logo_id being lost.

data_byte (logo data): Data body of logo data. "
The logo data module storing the compressed input logo data is sent from the logo data modularization unit 101 to the CDT sectioning unit 102. The CDT sectioning unit 102 distributes the logo data module to a plurality of sections of the CDT and transmits the same to the multiplexing unit 106. Here, the CDT has a data structure as shown in FIG. 12 (cited 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 size of up to 4 kbytes indicated by the section_length field, and the CDT can be divided into up to 256 sections for transmission.

  The respective information in FIG. 12 is defined as follows in Table 5-14 of 5.4.1.2 in ARIB TR-B 14 5.9.

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

  Describe section_syntax_indicator (section syntax instruction): 1.

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

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

  version_number (version number): The version number of the subtable, which is incremented by one each time the contents change, and returns to 0 after 31.

  current_next_indicator (current next indication): 1 is described.

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

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

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

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

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

data_module_byte () (data module byte): download data is described by a syntax defined for each data_type. "
The logo management information logo_id, logo_type, and logo_version are also sent to the logo data distribution descriptor generation unit 103 and the logo transmission descriptor generation unit 104. The logo data distribution descriptor generation unit 103 generates, for each logo data, a logo data distribution descriptor indicating the correspondence between the logo_type and the CDT section to be distributed, sends the logo data distribution descriptor to the CDT sectioning unit 102, and Place on In addition, the logo transmission descriptor generation unit 104 separately sets 0x01 when the CDT transmission method 1 is specified in the logo transmission type (logo_transmission_type), and logo data of logo identification (logo_id) and logo version number (logo_version). Along with the management information, download data identification (download_data_id) is added to generate a logo transmission descriptor. By setting download_data_id here to the same value as download_data_id of CDT, it becomes possible to specify logo data of CDT transmission corresponding to a certain broadcast channel (service). The SDT sectioning unit 105 arranges the logo transmission descriptor in the descriptor area of the SDT for each service_id specifying the broadcast channel, transmits it to the multiplexing unit 106, and carries out TS multiplexing with the CDT section data.

  Now, when the size of data for each logo_type stored in the logo data module falls within the size of 4 kbyte of one section, it is possible to transmit using one section. However, when transmitting logo data with a large number of pixels, such as 4K and 8K broadcasts, for example, it may exceed 4 kbytes. In addition, in ultra high definition digital broadcasting, when you want to select only a certain type of logo of a certain size and transmit it in an arbitrary order without using one with a small number of pixels among logo_type used in terrestrial digital broadcasting Is also conceivable. For these reasons, "the logo of each size is transmitted as it is in the section_number section that matches the" logo_type "value, which has been determined by the operation rules of terrestrial digital broadcasting. The rule can not be used. Therefore, in the present embodiment, the logo data distribution descriptor is defined so that the CDT can transmit even in such a case. The data structure of this logo data distribution descriptor is, for example, as shown in FIG.

  Assuming that the logo data module identified by logo_type is to be divided into CDT sections having consecutive section numbers for transmission, 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 Describe in the numbers_of_sections field. For example, suppose that two kinds of logo_type logo data are transmitted, logo data of 1000 bytes of logo_type = 0x05 is section number 0, and logo_type of 10000 bytes of logo data is temporarily assumed to be 0x06, for a total of three sections of 4000 bytes, 4000 bytes, and 2000 bytes. It divides and transmits sequentially from the 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 should be written as

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

  On the other hand, in the corresponding broadcast receiving apparatus, if it is detected 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 concerned is detected. Judging that it is transmitted, referring to the designated download_data_id, first, an arbitrary CDT section is acquired. As described above, by analyzing the logo data distribution descriptor described in the acquired CDT section, it can be grasped that the logo data of which logo_type is transmitted in the section (s) of which section number. Then, by setting to filter the section number of the required logo_type, it is possible to efficiently obtain the logo data.

  Next, the configuration of the broadcast receiving apparatus will be described. FIG. 14 is a block diagram showing the configuration of the broadcast receiving apparatus 1a according to the first embodiment. As shown in FIG. 14, the broadcast receiving apparatus 1a includes a channel 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 processing. Unit 207 (OSD: On-Screen Display), communication I / F unit 208, operation unit 209, NVRAM 210 (NVRAM: Non-Volatile RAM), ROM 211 (ROM: Read Only Memory), RAM 212 (RAM: Random Access Memory), The configuration includes a CPU 213 (CPU: Central Processing Unit), a descrambler 214, and a storage unit 215, and the units are connected by a bus 216.

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

  The video decoding unit 205 decodes the video signal output from the TS processing unit 204, and outputs the decoded video signal to the OSD processing unit 207. The voice processing unit 206 corresponds to the voice selection control unit 13, the decoder 14, the DMIX unit 15, the switching unit 16, the DAC 17, the voice 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 apparatus or output 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 predetermined OSD processing, for example, GUI display processing from the audio processing unit 206, on the video signal output from the video decoding unit 205 under the control of the CPU 213, and outputs the video signal to the display device 3. The display device 3 is an LCD (Liquid Crystal Display) or the like, and performs screen display based on the output video signal. For example, the display device 3 performs screen display such as an EPG or the like based on the SDT of the broadcast channel information description and the EIT of the program information description 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 according to a predetermined communication protocol under the control of the CPU 213. An operation unit 209 is an operation key, a remote controller, or the like, and receives user's operation input. 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, the format of content that can be handled by the broadcast receiving apparatus 2 is stored in the NVRAM 210 as setting information.

  The ROM 211 stores programs 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 develops the programs stored in the ROM 211 in the work area of the RAM 212 and sequentially executes them, thereby centrally controlling the operation of the broadcast receiving apparatus 1a.

  The module I / F unit 202 is an interface connected to the security module 220 in which encryption key information related to limited reception and 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 copes with the limited reception using the EMM and the 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, the processing operation regarding logo data of the receiving device executed under the control of the CPU 213 will be described along the flowchart shown in FIG.

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

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

  As described above, in the logo processing in the transmitting device, the receiving device, and the transmitting and receiving device according to the first embodiment, in the section-type logo data transmission, the correspondence between the logo type and the section transmitting the logo data to be transmitted Since the specification is made to send out the logo data distribution descriptor that indicates the relationship, it is efficient regardless of the size of the logo data, selecting the required number of logo data of the required type and efficiently in any order. It is possible to transmit to

  In the logo processing in the transmitting device, the receiving device, and the transmitting / receiving device according to the first embodiment, the explanation has been made using the CDT based on the MPEG-2 TS adopted in the current terrestrial broadcasting etc. The present invention may be applied to MH-CDT based on TLV (Type Length Value) / MMT (MPEG Media Transport) assumed to be adopted in advanced BS / high-bandwidth CS broadcasting and the like. When applied to MH-CDT based on TLV (Type Length Value) / MMT (MPEG Media Transport), it becomes the same as the TLV (Type Length Value) / MMT (MPEG Media Transport) broadcasting system of FIG. The processing at the time of switching the audio stream, and (2) logo processing can be implemented without any problem in combination.

  However, in the case of TLV (Type Length Value) / MMT (MPEG Media Transport), there are the following differences with respect to blocks and processing as compared with MPEG-2 TS. As for “MH-”, “The configuration of control information described in Reference 1 of this standard” in ARIB STD-B60 and “The table and descriptor specified in ARIB STD-B10 have the same function. However, if the table identifier or descriptor tag value is modified to be used in a broadcast system using MMT, the original table, descriptor and so on can be added by adding "MH-" meaning MPEG-H at the beginning of the name. It distinguishes. Is described.

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

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

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

Second Embodiment Processing of the Receiving Device When Switching Audio Streams
The processing of the receiving apparatus when the audio stream is switched is the same as in the first embodiment.

(Processing of logo in the second embodiment)
The transmission apparatus in the case of the TLV / MMT will be described below as the second embodiment.

  FIG. 16 shows the configuration, and logo data and logo management information for managing logos of this logo data are input, and logo data modularization unit 21, MH-CDT sectioning unit 22, MH-logo transmission, respectively. After passing through the descriptor generation unit 23 and the MH-SDT sectioning unit 24, the MMT multiplexing unit 25 multiplexes the video signal and the audio signal together with the video signal and the audio signal, and performs error correction coding etc. After being applied by the encoding / modulation unit 26, the signal is transmitted as a broadcast signal to the service area.

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

  The MH-CDT sectioning unit 22 distributes the logo data module input from the logo data modularization unit 21 to a plurality of sections of the MH-CDT, and transmits it to the MMT multiplexing unit 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 dividing it into a plurality. Do. Here, MH-CDT is identified for each download_data_id.

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

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

  When the CDT transmission method 1 is separately designated in the logo transmission type (logo_transmission_type), the MH-logo transmission descriptor generation unit 23 sets 0x01, and identifies the logo (logo_id) in the logo management information and the logo version number. Along with (logo_version), download data identification (download_data_id) is added to generate a 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, download_data_id (16 bits) in FIG. 17 is set to the same value as download_data_id (16 bits) in MH-CDT shown in FIG. 12 to support MH-CDT transmission corresponding to a certain broadcast channel (service). It becomes possible to identify logo data. Here, the MH-logo transmission descriptor generation unit 23 receives the logo data distribution information from the MH-CDT sectioning unit 22 and extends the contents of the logo data distribution information in the MH-logo transmission descriptor shown in FIG. Do.

  The MH-SDT (Service Definition Table) sectioning unit 24 assigns an MH-logo transmission descriptor to the descriptor area of the MH-SDT (Service Definition Table) for each service_id specifying a broadcast channel. It arranges and transmits to the MMT multiplexer 25 and multiplexes with the section data of MH-CDT.

  The essential difference from the configuration of the first embodiment shown in FIG. 10 is that instead of newly defining logo data distribution information as a descriptor and describing it in the descriptor area in the MH-CDT, the MH-SDT description is described. The MH-logo transmission descriptor (Table 7-79 MH-logo transmission descriptor of ARIB STD-B 60 1.4 version 7.4.3.34) is extended and described. The state of this expansion is shown in FIG.

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

  This FIG. 17 is an expansion of Table 7-79 MH-logo transmission descriptor of 7.4.3.34 in ARIB STD-B 60 1.4 version, and the expanded part is the part surrounded by the line in FIG.

  The information of the expanded part of 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 sections into which the logo data module is transmitted.

  The information of each part other than the expanded part of FIG. 17 is defined as follows in the configuration of Table 7-79 MH-logo transmission descriptor of ARIB STD-B 60 1.4 version 7.4.3.34.

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

  logo_id (logo identification): These 9 bits describe the ID of logo data defined in 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 in which the logo data is arranged (see ARIB STD-B21).

  logo_char (string for simple logo): These 8 bits describe a string for simple logo. As described above, in the logo processing in the transmission device, the reception device, and the transmission / reception device according to the second embodiment, the necessary number of logo data of the required type is selected independently of the size of the logo data. Can be efficiently transmitted in any order.

  Furthermore, by expanding MH-SDT to describe logo data distribution information, logo data distribution information can be acquired before MH-CDT acquisition, so at the receiver side, first, any one section of MH-CDT In the case of FIG. 15 of obtaining and confirming the logo data distribution descriptor, the step of S25 is not necessary, and it becomes possible to obtain the necessary logo_type logo data more efficiently.

  The processing of this embodiment is also applicable to the case of the MPEG-2 TS method of the first embodiment.

(Configuration of Broadcast Reception Device 1a of Second Embodiment)
As the configuration of the broadcast receiving apparatus 1 a of 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 the reception signal of the broadcast wave obtained by the receiving antenna (not shown), and performs demodulation processing and error correction decoding processing in the transmission path demodulation / decoding unit 201 to obtain a TLV stream, and performs TS processing Instead of the unit 204, the TLV / MMT separation unit 12 separates the video stream and the audio stream from the TLV stream, and outputs the video stream and the audio stream 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 parts different from the second embodiment will be described.

Third Embodiment Processing of the Receiving Device When Switching Audio Streams
The processing of the receiving apparatus when the audio stream is switched is the same as in the first embodiment.

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

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

  The "2K" logo has the same size limit of 1152 bytes as "HD large" for terrestrial digital broadcasting, and can be sent on one MH-CDT, but "small" is 8000 bytes and "large" is 16000 bytes. It is assumed to be an upper limit and can not be sent with one MH-CDT. For this reason, a provision for transmitting logo data by a plurality of MH-CDTs is newly required.

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

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

  That is, in the third embodiment, a service logo having a large size which does not fit in one section is transmitted by the MH-CDT by a change in only the operation specification such as a change in the definition of data_module_byte. Therefore, it is added to ARIB standard for the purpose of changing MH-logo transmission descriptor definition, with new data structure which is not MH-CDT, or describing new descriptor inserted in MH-CDT. And there is no need to make any changes.

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

[Example 1 of Logo Processing of Third Embodiment]
In the logo data modularization unit 101 shown in FIG. 10, with respect to the syntax of data_module_byte of terrestrial digital broadcast, the number of bytes of the logo of the corresponding logo_type, that is, the total size of the data divided into each section Add the field "total_logo_size". An example is shown in FIG. In addition, instead of using “transmit logos of each size in the section of section_number that matches the logo_type value” in terrestrial digital broadcasting, the section_number value used for each logo_type is fixed and used. Stipulate stipulations.

Here temporarily
2K 0
Large 1 to 4
Small 5 to 6
I assume.

  In addition, logo data is divided every 4000 bytes and stored in data_byte. By determining in this way, the range of section_number of the section to be 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, get all sections with section_number 0 to 6 and then determine the logo_type in data_module_byte to determine that section_numbers 5 and 6 do not fall under section_number. You only need to get sections 5 and 6

  Moreover, by adding total_logo_size and determining the division size, it becomes possible to judge that it is not necessary to receive all the sections of section_number determined by logo_type. For example, if total_logo_size is 10000 bytes for a large logo, it is understood that the data_size of sections with section_number 1 to 4 are in order 4000 bytes, 4000 bytes, 2000 bytes, 0 bytes respectively, and it is understood that acquisition of sections of section_number = 4 is unnecessary . Similarly, if the section of section_number = 5 is acquired and the total_logo_size is 4000 bytes or less, it is known that acquisition of the section of section_number = 6 is unnecessary.

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

  Also, although the division size is 4000 bytes as an example here, it may be another value. For example, assuming that the division size is 4070 bytes, a logo having a total_logo_size of 10000 bytes may be divided into 4070 bytes, 4070 bytes, 1860 bytes, and 0 bytes.

  Also, here, total_logo_size is added as an example to data_module_byte to determine the division size, but it is also possible to add information on whether or not there is a continuation in data_module_byte without determining the division size, and also to determine the division size Other information may be added, such as whether or not there is a continuation.

[Example 2 of logo processing of the third embodiment]
The sections in the stream do not know in which order they are sent, and also, while the section filter setting for acquiring the next section is being retried after acquiring one section, unacquired sections If one section is acquired and then the next section is acquired, it is possible that it takes a long time to acquire all the desired sections. In addition, although the acquisition time can be shortened by setting the section filter at the same time, it consumes a lot of resources of the section filter.

  As a means to avoid this, it is conceivable to specify a mask as a section filter condition.

  It is a function to acquire a section whether it is 0 or 1 for some bits. In the mask specification of section_number, the bit specifying 0 as a bit specified as 0 is designated as x, and the bit which may be 0 or 1 is represented as x.

  The large logo has up to 4 sections, the small logo has up to 2 sections, and it is better to mask with 2 bits for the large logo and 1 bit for the small logo. Therefore, assume that the mask designation of the large logo section_number is 000001xx (00000100000010100000110,00000111), and the mask designation of the small logo section_number is 0000001x (0000001000000011).

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

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

  Normally, section_number is allocated without omission from 0 to last_section_number, but in EIT [schedule] (and MH-EIT [schedule]), an operation is such that an intermediate section may be left out as an exception. Therefore, if MH-CDT is specified not to send the section of section_number = 1, it is possible to transmit logo data of each logo_type in seven sections of section_number 0 and 2 to 7. .

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

[Example 3 of logo processing of the third embodiment]
In the case of specifying the same mask as in the second embodiment, if invalid data can be indicated, this can be realized without performing an exception operation such as not sending an intermediate section.

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

[Example 4 of logo processing of the third embodiment]
Alternatively, in the case of performing the same mask designation as in the second embodiment, it is possible to use one section for transmitting other information instead of sending logo data itself.

  The 2K logo is transmitted by section_number = 1, another section is transmitted by section_number = 0, section_number = 0 is used to transmit special data and section_number 1-7 is transmitted by logo data it can.

  For example, as shown in FIG. 20, data_module_byte in the case of section_number = 0 can indicate which logo_type of logo data is being sent by each section number, that is, logo data distribution information. In the example of FIG. 20, the number of logo_types, which is the number of logo_types, is looped to specify the number of bytes of logo data for each section_number (start_section_number + j) used in each logo_type.

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

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

  As described above, in the logo processing in the transmission device, the reception device, and the transmission / reception device according to the third embodiment, a new data structure that is not MH-CDT by changing the definition of data_module_byte and the assignment rule of section_number, Alternatively, without additionally defining a new descriptor to be inserted into the MH-CDT in the ARIB standard or changing the definition of the MH-logo transmission descriptor in the ARIB standard, a large size which does not fit in one section. It is possible to transmit the service logo on the MH-CDT.

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

  In the third embodiment, CDT and MH-CDT are generically referred to as common data table information, SDT and MH-SDT as generically service description table information, and a logo transmission descriptor and an MH-logo transmission descriptor. Collectively referred to as a logo transmission descriptor.

  While certain embodiments have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are included in the invention described in the claims and the equivalents thereof. In the present specification, "broadcasting" also includes "IP broadcasting" using an internet protocol.

(1) A digital television capable of multiplex transmission of an arbitrary number of different types of logo data per type of logo identification in a plurality of sections of common data table information in a size exceeding the amount of data that can be sent in one section of common data table information. A broadcast system,
The modularization module modularizes the logo data according to the logo identification and logo type,
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 the logo data of the logo data Generate and output logo data distribution information indicating the correspondence between the type of the file and the section to be distributed,
A second sectioning unit generates a logo transmission descriptor from the logo identification of the logo data contained in the logo management information and the version number of the logo and the logo data distribution information having the same download data identification as the download data identification. Generate information and insert into service description table information,
A transmission system for transmitting a broadcast signal in which the common data table information generated by the first sectioning unit and the service description table information generated by the second sectioning unit are multiplexed by the multiplexing unit;
The broadcast signal is received, the service description table information is acquired, the logo transmission descriptor information is extracted from the acquired service description table information, and the logo transmission information, the logo management information, and the logo data distribution information are extracted. Logo identification, logo type stored in the module from multiple sections acquired and distributed to the common data table information of the broadcast signal based on the acquired logo transmission information, logo management information and logo data distribution information A transmitting / receiving device equipped with a receiving system for acquiring each logo data.

(2) A digital television capable of multiplex transmission of an arbitrary number of different types of logo data per type of logo identification in multiple sections of common data table information in a size exceeding the amount of data that can be sent in one section of common data table information. Used in broadcast systems,
A modularization unit that modularizes the logo data according to the logo identification and the logo type;
The logo data modularized by the modularization unit is distributed to a plurality of sections of the common data table information having the same download data identification and outputted, and the logo data type and the section distributed with respect to the logo data A first sectioning unit that generates and outputs logo data distribution information indicating a correspondence relationship with
Logo transmission descriptor information is generated from the logo identification of the logo data and the logo version number included in the logo management information, and the logo data distribution information having the same download data identification as the download data identification, and a service description A second sectioning unit for inserting into table information;
Transmitting apparatus comprising a multiplexing unit for transmitting a broadcast signal in which common data table information generated by the first sectioning unit and service description table information generated by the second sectioning unit are multiplexed .

(3) Used in a digital television broadcasting system capable of multiplexing and transmitting any number of different types of logo data per logo identification with a size exceeding the amount of data that can be sent in one section of common data table information,
The modularization module modularizes the logo data according to the logo identification and logo type,
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 the logo data of the logo data Generate and output logo data distribution information indicating the correspondence between the type of the file and the section to be distributed,
A second sectioning unit generates a logo transmission descriptor from the logo identification of the logo data contained in the logo management information and the version number of the logo and the logo data distribution information having the same download data identification as the download data identification. Generate information and insert into service description table information,
A multiplexing unit supports 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, and
A receiver for receiving the broadcast signal;
The service description table information is acquired from the broadcast signal received by the reception unit, and the logo transmission descriptor information is extracted from the acquired service description table information to distribute the logo transmission information, the logo management information, and the logo data. 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, With logo data acquisition department to acquire logo data for each logo type,
Receiver equipped with.

  Although the above-described first to third embodiments have been described as an example of applying the present invention to transmission of service logo data such as a logo mark used in a program section, the present invention transmits other image data. It may be applied to

  1, 1a: Broadcast receiving apparatus, 1A: Video processing unit, 1B: GUI display unit, 1C: operation input unit, 2: AV amplifier, 3: display device, 11: transmission path demodulation / decoding unit, 12: TLV / MMT Demultiplexing unit 13 Audio selection control unit 14 Decoder 15 DMIX unit 16 Switching unit 17 DAC 18 Audio output unit 19 External output interface 21 Logo data modularization unit 22 MH-CDT sectioning unit, 23 ... MH-logo transmission descriptor generating unit, 24 ... MH-SDT sectioning unit, 25 ... MMT multiplexing unit, 26 ... transmission path coding / modulation unit, 101 ... logo data modularization , 102 ... CDT sectioning unit, 103 ... logo data distribution descriptor generating unit, 104 ... logo transmission descriptor generating unit, 105 ... SDT sectioning unit, 106 ... multiplexing unit, 107 Transmission path encoding / modulation unit 201 Transmission path 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 transmitting / receiving system comprising a transmitting device and a receiving device for transmitting logo data indicating a logo by a TLV stream in a section format table CDT (Common Data Table) based on TLV (Type Length Value) / MMT (MPEG Media Transport),
The logo data is prepared for each pixel number,
The contents of the logo transmission descriptor placed in the descriptor area of the service description table transmitted by the TLV stream change according to the logo transmission type,
If the logo transmission type of the logo transmission descriptor is 0x01, the logo transmission descriptor is
Logo identification that describes the ID of 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;
A logo type for identifying the logo data according to the number of pixels;
The start section number representing the first section number for dividing and transmitting the logo data of the logo type, and
The number of transmission sections representing the number of sections transmitting logo data of the logotype
Including
After the logo identification is the logo version number,
The download data identification follows the logo version number,
After the download data identification, there is the logotype,
After the logotype is the starting section number,
After the start section number is the number of transmission sections,
The transmitting device is
If the size of the logo data of one logo type exceeds the size that can be transmitted in one section, the logo data identified by the logo type is assigned to the CDT section with a consecutive section number
Assign multiple logo data of different logotypes sequentially to the CDT section starting from section number 0,
Assign logo data of the first pixel number to the CDT section of section number 0,
Assign logo data of the second pixel number having a pixel number larger than the first pixel number to a plurality of CDT sections starting from the section number 1,
Multiplexing a service description table including the logo transmission descriptor with a CDT composed of data of the CDT section to generate a multiplexed signal ;
Error correction coding, modulation and transmission of the multiplexed signal,
The receiving apparatus acquires the logo data based on the start section number and the number of transmission sections included in the logo transmission descriptor disposed in the descriptor area of the service description table transmitted by the TLV stream. Transmission and reception system.

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