WO2020004051A1

WO2020004051A1 - Reception device and receiving method

Info

Publication number: WO2020004051A1
Application number: PCT/JP2019/023412
Authority: WO
Inventors: 知也小島; 雄一平山
Original assignee: ソニーセミコンダクタソリューションズ株式会社
Priority date: 2018-06-27
Filing date: 2019-06-13
Publication date: 2020-01-02
Also published as: JP2021158395A; CN112335255B; KR102663341B1; CN112335255A; KR20210023858A

Abstract

The present invention pertains to: a reception device capable of making it easier to output a desired stream; and a receiving method. Provided is a reception device equipped with a control unit for performing control so as to select an output stream which is to be outputted and which is extracted from a transmission stream on the basis of the presence or absence of a multi-frame header included in a transmission stream transmitted in each of one or more carrier waves, or on the basis of header information of the multi-frame header. The present invention is applicable, for example, to receivers that are compatible with digital cable television broadcasting.

Description

Receiving device and receiving method

The present technology relates to a receiving device and a receiving method, and more particularly, to a receiving device and a receiving method capable of outputting a desired stream more easily.

In order to transmit a large-capacity signal that cannot be transmitted in one channel, an existing transmission method is extended, and a multi-carrier transmission method is known in which a large-capacity signal is divided and transmitted using a plurality of carriers. (For example, see Patent Document 1).

WO 2016/117283

By the way, when it is possible to output various types of streams such as a stream conforming to the multi-carrier transmission scheme, there is a demand for easily outputting a desired stream.

The present technology has been made in view of such a situation, and is intended to output a desired stream more easily.

The receiving device according to one aspect of the present technology is extracted from the transmission stream based on the presence or absence of a multiplexed frame header included in a transmission stream transmitted for each one or a plurality of carriers, or based on header information of the multiplexed frame header. The receiving device includes a control unit that performs control for selecting an output stream to be output.

The receiving method according to one aspect of the present technology may be configured such that a receiving apparatus determines whether or not there is a multiplexed frame header included in a transmission stream transmitted for each one or a plurality of carriers, or based on header information of the multiplexed frame header, based on the transmission stream. This is a receiving method for performing control for selecting an output stream to be output, which is extracted from.

In the reception device and the reception method according to one aspect of the present technology, the transmission is performed based on the presence or absence of a multiplex frame header included in a transmission stream transmitted for each of a plurality of carrier waves, or based on header information of the multiplex frame header. Control for selecting an output stream to be output extracted from the stream is performed.

The receiving device according to one aspect of the present technology may be an independent device, or may be an internal block configuring one device.

According to one aspect of the present technology, a desired stream can be output more easily.

Note that the effects described here are not necessarily limited, and may be any of the effects described in the present disclosure.

FIG. 1 is a diagram illustrating a configuration of an embodiment of a transmission system to which the present technology is applied. FIG. 3 is a block diagram illustrating an example of a configuration of a transmission device. FIG. 4 is a diagram illustrating an example of a stream processed by the receiving device. FIG. 3 is a diagram illustrating an example of a configuration of a multiplex frame. It is a figure showing the outline of the syntax of a multiplex frame header. FIG. 3 is a diagram illustrating an example of a configuration of a TLV packet and a divided TLV packet. It is a block diagram which shows the example of a structure of the receiver which has the present function. 9 is a flowchart illustrating a flow of a stream output setting process corresponding to a current function. 9 is a flowchart illustrating a flow of a stream output setting process corresponding to a current function. It is a block diagram which shows the example of a structure of the receiver which has a new function. It is a figure which shows the example of a reception setting by the transmission system of a cable television, a discrimination standard, and automatic output selection. It is a figure which shows the example of channel selection and TS / TLV discrimination. FIG. 9 is a diagram illustrating an example of a carrier wave in the case of the method of Table A. FIG. 9 is a diagram illustrating an example of a signal flow in a demodulation IC in the case of the method of Table A. FIG. 9 is a diagram illustrating an example of a carrier wave in the case of the method of Table B. FIG. 9 is a diagram illustrating an example of a signal flow in a demodulation IC in the case of the method of Table B. FIG. 9 is a diagram illustrating an example of carrier waves in the case of the method of Table Ca. FIG. 9 is a diagram showing an example of a signal flow in a demodulation IC in the case of the method of Table Ca. It is a figure which shows the example of the carrier in the case of the method of Table Da. FIG. 9 is a diagram illustrating an example of a signal flow in a demodulation IC in the case of the method of Table Da. FIG. 9 is a diagram illustrating an example of carrier waves in the case of the method of Table Eb. FIG. 10 is a diagram illustrating an example of a signal flow in a demodulation IC in the case of the method of Table Eb. FIG. 8 is a diagram illustrating an example of carrier waves in the case of the method of Table Fa. FIG. 8 is a diagram illustrating an example of a signal flow in a demodulation IC in the case of the method of Table Fa. FIG. 8 is a diagram illustrating an example of carrier waves in the case of the method of Table Fc. FIG. 10 is a diagram illustrating an example of a signal flow in the demodulation IC in the case of the method of Table Fc. It is a figure which shows the example of the carrier wave in the case of the method of Table Ga. FIG. 10 is a diagram illustrating an example of a signal flow in the demodulation IC in the case of the method of Table Ga. FIG. 9 is a diagram illustrating an example of carrier waves in the case of the method of Table Hb. FIG. 9 is a diagram illustrating an example of a signal flow in a demodulation IC in the case of the method of Table Hb. It is a flowchart explaining the flow of a process of a transmitting side and a receiving side. 9 is a flowchart illustrating a flow of a stream output setting process corresponding to a new function. It is a flowchart explaining the flow of a demodulation / synthesis process. FIG. 11 is a diagram illustrating a configuration example of a computer.

Hereinafter, embodiments of the present technology will be described with reference to the drawings. The description will be made in the following order.

1. Embodiment 2 of present technology. Modification 3 Computer configuration

<1. Embodiment of the present technology>

(Configuration example of transmission system)
FIG. 1 is a diagram illustrating a configuration of an embodiment of a transmission system to which the present technology is applied. Note that a system refers to a system in which a plurality of devices are logically aggregated.

In FIG. 1, the transmission system 1 is a system corresponding to a broadcasting system of digital cable television broadcasting such as ISDB-C (Integrated Services Digital Broadcasting for Cable).

In this digital cable television broadcasting (cable television), a multi-carrier transmission system is adopted, and a stream that exceeds the transmission capacity of one carrier is divided and transmitted using a plurality of carriers on a transmitting side, so that a plurality of carriers are transmitted on a receiving side. , The divided streams are combined. In the multiple carrier transmission scheme, a modulation scheme such as 64 QAM (Quadrature Amplitude Modulation) or 256 QAM is used for each of a plurality of carriers.

The transmission system 1 includes a transmission device 10, a reception device 20, and a CATV transmission path 30. Although FIG. 1 shows one receiving device 20 for simplicity of description, actually, the receiving device 20 is installed at each cable television subscriber's house.

The transmission device 10 is a head end installed in a cable television station.

The transmission device 10 receives a broadcast signal of a terrestrial broadcast or a satellite broadcast, processes a content stream such as a program thereof, and transmits (retransmits) the content stream to the reception device 20 via the CATV transmission path 30. In addition to the retransmission, the transmitting apparatus 10 transmits a content stream such as a program independently produced by a cable television station or a program received via a communication line such as the Internet via the CATV transmission path 30 to the receiving apparatus. 20.

The CATV transmission line 30 is made up of a transmission medium such as a coaxial cable and an optical fiber, for example, and connects the head end of the cable TV station and the subscriber's home of the cable TV by wire.

The receiving device 20 is, for example, a fixed receiver such as a TV receiver or a set top box (STB: Set Top Box) installed in a cable television subscriber's house.

The receiving device 20 receives the broadcast signal transmitted from the transmitting device 10 via the CATV transmission path 30 and processes the content stream, thereby displaying the video of the program or the like on the display and displaying the video of the program or the like from the speaker. Outputs audio synchronized with. As a result, the cable television subscriber can view contents such as programs.

(Example of configuration of transmission device)
FIG. 2 is a block diagram illustrating an example of a configuration of the transmission device 10 of FIG.

2, the transmitting apparatus 10 includes input ports 101-1 to 101-3, a front-end signal processing unit 102, a slot allocating unit 103, TSMF processing units 104-1 to 104-3, and QAM modulation units 105-1 to 105-5. -3, and a mixing unit 106.

The input port 101-1 is a port for inputting a signal (TS signal) in a transport stream format, and supplies the TS signal input thereto to the slot allocation section 103.

The input port 101-2 is a port for inputting a TLV (Type Length Value) format signal (TLV signal), and supplies the TLV signal input thereto to the slot allocating unit 103.

(4) The input port 101-3 supplies the IF signal or the RF signal input thereto to the front-end signal processing unit 102.

(4) The front-end signal processing unit 102 performs front-end signal processing on the IF signal or the RF signal supplied from the input port 101-3 and supplies the processed signal to the slot allocation unit 103.

The slot allocating unit 103 multiplexes (divides and multiplexes) the signal input thereto by allocating the signal to a slot on a multiplexed frame (Transport Streams Multiplexing Frame), and divides the resulting signal into a TSMF processing unit. It supplies to 104-1 to 104-3.

TSMF processing section 104-1 performs TSMF processing on TSMF on the signal supplied from slot allocation section 103, and supplies the resulting signal to QAM modulation section 105-1.

TSMF processing section 104-2 performs TSMF processing on the signal supplied from slot allocation section 103, and supplies the resulting signal to QAM modulation section 105-2.

TSMF processing section 104-3 performs TSMF processing on the signal supplied from slot allocation section 103 and supplies the resulting signal to QAM modulation section 105-3.

The QAM modulating section 105-1, based on information such as NIT (Network Information Table) and TSMF header information, applies a signal supplied from the TSMF processing section 104-1 according to a modulation method such as 64 QAM or 256 QAM. The resulting signal is supplied to the mixing section 106.

The QAM modulation section 105-2 performs modulation processing on the signal from the TSMF processing section 104-2 based on the NIT and TSMF header information and the like, and supplies the resulting signal to the mixing section 106.

The QAM modulator 105-3 performs a modulation process on the signal from the TSMF processor 104-3 based on the NIT and TSMF header information and the like, and supplies the resulting signal to the mixer 106.

The mixing unit 106 mixes the signals supplied from the QAM modulation units 105-1 to 105-3 and transmits (transmits) them as a broadcast signal.

(Processing example of receiving device)
FIG. 3 is a diagram illustrating an example of a stream processed by the receiving device 20 of FIG.

The receiving device 20 includes a receiving system 200 including, for example, a demodulation IC, a combining device, and the like. The receiving system 200 processes and outputs a stream extracted from a broadcast signal transmitted from the transmitting device 10.

Here, as the stream processed by (the receiving system 200 of) the receiving device 20, for example, a single transport stream (single TS) conforming to a single TS multiplexing scheme, or a stream conforming to a multiple TS multiplexing scheme Since a plurality of transport streams (a plurality of TSs) and a transport stream conforming to a multi-carrier transmission scheme are included, the receiving system 200 needs to support various types of streams.

Single TS is used for ordinary broadcasting, for example. On the other hand, transport streams of a plurality of TSs and a plurality of carrier wave transmission schemes are used, for example, when retransmitting satellite broadcast content by cable television.

As satellite broadcasting (BS broadcasting), the operation of advanced broadband satellite digital broadcasting (advanced BS broadcasting) is started. For example, while multiple TSs are used for retransmission of normal BS broadcasting, The transport stream of the transmission method can be used for retransmission of advanced BS broadcasting which provides a service of 4K / 8K ultra-high definition television broadcasting.

(Configuration of multiple frames)
FIG. 4 is a diagram illustrating an example of the configuration of a multiplex frame.

In FIG. 4, a multiplexed frame (TSMF) such as a plurality of TSs has one slot assigned to a multiplexed frame header (TSMF header) and 52 slots assigned to data of each program such as program A, program B, and program C. One frame is composed of a total of 53 slots. Each program such as program A, program B, and program C is a program on a channel of a different broadcasting station.

(Overview of TSMF header)
FIG. 5 is a diagram showing an outline of the syntax of a multiplexed frame header (TSMF header).

The TSMF header includes a packet header, frame_sync, version_number, relative_stream_number_mode, frame_type, stream_status, stream_id / original_network_id, receive_status, reserved_for_future_use, emergency_indicator, relative_stream_number, extended information, and CRC fields as header information. These fields specify the parameters of the header information.

The packet header contains the synchronization byte, frame_PID, and continuity indicator. frame_sync is a field of a TSMF synchronization signal. version_number is a field for instructing a change of the TSMF header.

Relative_stream_number_mode is a field for distinguishing a slot arrangement method. frame_type is a field for distinguishing the TSMF format. stream_status is a field for indicating validity / invalidity for the relative stream number.

$ Stream_id / original_network_id is a field for identifier / relative stream number correspondence information. Hereinafter, stream_id is also referred to as a stream identifier, and original_network_id is also referred to as a network identifier. Further, the stream identifier (stream_id) and the network identifier (original_network_id) are collectively referred to as identification information.

$ Receive_status is a field indicating reception information at the head end. reserved_for_future_use is a field (undefined) for future expansion. emergency_indicator is a field for instructing an emergency alert. relative_stream_number is a field for relative stream number versus slot correspondence information.

Extension information is arranged by extending the area using private_data when extending the header information of the TSMF header. CRC is a CRC (Cyclic Redundancy Check) value field for error detection.

Here, in the extension information, for example, information for combination is defined. The extension information includes fields of earthquake_early_warning, stream_type, group_id, number_of_carriers, carrier_sequence, number_of_frames, frame_position, and field_for_extension.

Earthquake_early_warning is a field for earthquake ground warning information of terrestrial digital broadcasting.

$ Stream_type is a field for indicating a stream type. “TS” or “TLV” is specified as the stream_type. That is, “TS” is specified for a transmission stream (TS) including a TS packet, and “TLV” is specified for a transmission stream (TLV) including a TLV packet (divided TLV packet).

Hereafter, stream_type is also referred to as type information. Further, the TS packet is a fixed-length (for example, 188 bytes) packet, and is therefore also referred to as a fixed-length packet. On the other hand, the TLV packet is a variable-length packet, and is therefore also referred to as a variable-length packet.

Group_id is a field for identifying a carrier group.

$ Number_of_carriers is a field for indicating the total number of carriers constituting the carrier group. carrier_sequence is a field for instructing the synthesis order of the demodulated output of the carrier. Hereinafter, the total number of carrier waves (number_of_carriers) and the order of carrier waves (carrier_sequence) are collectively referred to as combined information.

$ Number_of_frames is a field for indicating the number of frames included in a superframe. frame_position is a field for frame position information. field_for_extension is a field (undefined) for a future extension.

(Configuration of TLV and split TLV)
FIG. 6 is a diagram illustrating an example of the configuration of a TLV packet and a divided TLV packet.

Here, in the broadcasting system of digital cable television broadcasting (for example, ISDB-C or the like), a demodulated and output signal is a TS format signal (TS signal), whereas a broadcasting such as an advanced BS broadcasting is performed. In the system, the signal is a TLV format signal (TLV signal). Therefore, in order to carry (transmit) a TLV signal in a broadcasting method such as advanced BS broadcasting in a broadcasting method such as ISDB-C, it is necessary to convert the TLV signal into a signal in a TS format.

That is, the TLV packet is divided, and the variable TLV vector is converted into a fixed-length format of 188 bytes as the divided TLV packet. Note that the TS packet is 188 bytes, and the slot of the multiplex frame (TSMF) is also composed of 188 bytes of the same size as the TS packet.

Specifically, in FIG. 6, for example, when the TLV packet P1 and the TLV packet P2 are continuous, the TLV packet P1 is divided into three in units of 185 bytes, and the divided TLV packets DP1, DP2, and DP3 are added to the payload. Store each. The divided TLV packet DP has a payload of 185 bytes, and a 3-byte divided TLV packet header is added. That is, 3 bytes of the divided TLV packet header and 185 bytes of the payload make up a total of 188 bytes.

In the example of FIG. 6, a part (signal of 185 bytes) of the TLV packet P1 is sequentially stored in the payload of each of the divided TLV packets DP1 and DP2, and the remaining part (a signal of less than 185 bytes) is divided. It is stored in the payload of packet DP3. That is, the remaining portion of the TLV packet P1 (signal of less than 185 bytes) and the subsequent portion of the TLV packet P2 (signal of less than 185 bytes) are stored in the payload of the divided TLV packet DP3, and a total of 185 It becomes bytes.

(4) In the multi-carrier transmission system, synthesis is performed using a format using a multiplexed frame (TSMF header) as shown in FIG. 4 and a divided TLV packet shown in FIG. At this time, by adding the TSMF header (FIG. 5) to the TLV signal (TLV stream) that has been divided into TLV packets, it is possible to process the transport stream as a multiplex frame configuration.

(Example of current functions)
Here, for comparison with a new function to which the present technology is applied, the configuration and operation of the receiving device 20 having the current function will be described with reference to FIGS. 7 to 9.

FIG. 7 is a block diagram showing an example of the configuration of the receiving device 20 having the current functions.

7, the receiving apparatus 20 having the current functions includes a microcontroller 900, tuners 901-1 to 901-4, demodulation ICs 902-1 to 902-4, a system-on-chip 903, and a display 904. .

The microcontroller 900 controls the operation of each unit of the receiving device 20.

The tuners 901-1 to 901-4 receive the broadcast signal transmitted from the transmission device 10, perform necessary processing, and output the signals to the demodulation ICs 902-1 to 902-4, respectively.

The demodulation ICs 902-2 to 902-4 perform demodulation processing on the signals received from the tuners 901-2 to 901-4, and output the resulting transmission stream to the demodulation IC 902-1.

The demodulation IC 902-1 performs a demodulation process on a signal received from the tuner 901-1. The demodulation IC 902-1 performs processing such as combining the transmission stream obtained by its own demodulation processing and the transmission streams from the demodulation ICs 902-2 to 902-4, and outputs the resulting output stream to be output to the system on. Output to chip 903.

The system-on-chip 903 performs processing such as decoding on the output stream from the demodulation IC 902-1, and outputs the resulting video data to the display 904.

The display 904 displays an image corresponding to the image data from the system-on-chip 903. Although not shown in FIG. 7, audio data processed by the system-on-chip 203 is output to a speaker, and an audio corresponding to the audio data is output.

As described above, in the receiving apparatus 20 having the current function (FIG. 7), the demodulation IC 902-1 has the function of demodulating the signal received from the tuner 901-1 and the tuners 901-1 to 901- 4 and a function of controlling the demodulation ICs 902-1 to 902-4 and outputting a composite stream and a transport stream (single TS or multiple TSs) from the demodulation IC 902-1.

Next, the flow of the stream output setting process executed by the receiving device 20 (FIG. 7) having the current function will be described with reference to the flowcharts of FIGS.

Here, first, stream_id and original_network_id are set in the demodulation IC 902-1 (S11), and the TS packet of the demodulation IC 902-1 is read (S12). Then, in the determination process of step S13, the demodulation IC 902-1 determines whether a TSMF packet exists.

If it is determined in step S13 that a TSMF packet exists ("YES" in S13), the process proceeds to step S14. Then, the data of the TSMF header is read from the demodulation IC 902-1 (S14) and stored in the memory (S15). At this time, the extension information is extracted from the TSMF header (S16), and it is determined in the determination process of step S17 whether the extension information exists.

If it is determined in step S17 that extended information is present ("YES" in S17), the process proceeds to step S18. In step S18, a TSMF header process is performed on another demodulation IC 902-N. Here, the details of the TSMF header processing corresponding to step S18 in FIG. 8 will be described with reference to the flowchart in FIG.

In this TSMF header process, first, N = 2 is set as the initial value of the demodulation IC 902 (S31), and the value of N is incremented (S37) until N> = 4 (“YES” in S38). The loop of steps S32 to S38 is repeated.

{That is, stream_id and original_network_id are set in the demodulation IC 902-N (S32), and the TS packet of the demodulation IC 902-1 is read (S33). Then, in the determination processing of step S34, the demodulation IC 902-N determines whether a TSMF packet exists.

If it is determined in step S34 that a TSMF packet exists ("YES" in S34), the process proceeds to step S35. Then, the data of the TSMF header is read from the demodulation IC 902-N (S35) and stored in the memory (S36).

Here, if it is determined that the condition of N> = 4 is not satisfied after the value of N has been incremented (“NO” in S37 and S38), the process returns to step S32, and the loop of steps S32 to S38 Is repeated. Then, when it is determined that the condition of N> = 4 is satisfied (“YES” in S38), or when it is determined that no TSMF packet exists (“NO” in S34), the TSMF header process ends. The process returns to step S18 in FIG.

(8) In step S19 of FIG. 8, the extended information obtained in the processing of step S16 and the extended information obtained from the TSMF header obtained in the TSMF header processing (FIG. 9) are processed. Then, in the determination processing of step S20, it is determined whether or not combination is possible based on the result of the processing of the extended information (S19).

場合 If it is determined in step S20 that the combination is possible (“YES” in S20), the process proceeds to step S21. Then, the stream to be combined is set as the output format in the demodulation IC 902-1 (S21). Subsequently, in the determination process of step S22, it is determined whether or not the stream type is "TLV" based on the result of the extended information process (S19).

場合 If it is determined in step S22 that the stream type is “TLV”, the process proceeds to step S23. Then, a TLV stream (TLV conversion target stream) is set as a stream format in the demodulation IC 902-1 (S23). On the other hand, if it is determined in step S22 that the stream type is “TS”, the process proceeds to step S24. Then, a TS stream (stream not subject to TLV conversion) is set as the stream format in the demodulation IC 902-1 (S24).

On the other hand, when it is determined that the TSMF packet does not exist (“NO” in S13), when it is determined that the extension information does not exist (“NO” in S17), or when it is determined that the combining cannot be performed. ("NO" in S20), the process proceeds to step S25. Then, a non-synthesis target stream is set as an output format in the demodulation IC 902-1 (S25).

When the processing in step S23, S24, or S25 is completed, the processing proceeds to step S26. Then, an ON state is set to the demodulation IC 902-1 as a stream output.

The flow of the stream output setting process corresponding to the current function has been described above. In the stream output setting processing, for example, the reading and writing of data of the demodulation IC 902 is performed in the processing of steps S11, S12, S14, S18 (S32, S33, S35 in FIG. 9), S21, S22, S23, S24, and S26 in FIG. Need to be time consuming. In particular, in FIG. 7, since a plurality of tuners 901 are provided and a plurality of demodulation ICs 902 are provided corresponding to the tuners, more time is required to read data from each demodulation IC 902. As a result, in the receiving apparatus 20 having the current function (the receiving system 200), for example, the time until the video is displayed after switching the program is increased.

In the receiving device 20 (the receiving system 200 thereof), the stream to be synthesized is synthesized based on the header information (extended information) of the TSMF header of the TSMF packet. , The control of which stream is output as the output stream to be output becomes complicated. Further, as illustrated in FIG. 3, in the receiving device 20 (the receiving system 200), for example, a transport stream conforming to a single TS multiplexing scheme, a transport stream conforming to a plurality of TS multiplexing schemes, and further, It is necessary to process and output various types of streams such as a transport stream conforming to the multi-carrier transmission scheme, and there is a demand for easily outputting a desired stream.

Further, in the stream output setting process corresponding to the current function, it is necessary to hold the data of the TSMF packet in the memory (S15 in FIG. 8 and S36 in FIG. 9), so that an extra memory is required as the receiving system 200. become. This may cause a problem in terms of cost and processing speed.

み In view of such a problem, a new function to which the present technology is applied enables a desired stream to be output more easily. In addition, with the new function to which the present technology is applied, for example, the time until a video is displayed after a program is switched is reduced, and an extra memory is not provided as the receiving system 200. I do. Hereinafter, the configuration and operation of the receiving device 20 having the new function will be described.

(Configuration example of new-function receiver)
FIG. 10 is a block diagram illustrating an example of a configuration of the receiving device 20 having a new function.

In FIG. 10, the receiving apparatus 20 having the new functions includes tuners 201-1 to 201-4, demodulation ICs 202-1 to 202-4, a system-on-chip 203, and a display 204. Note that the tuner 201, the demodulation IC 202, and the system-on-chip 203 correspond to at least a part of the reception system 200 in FIG.

The tuner 201-1 receives the broadcast signal transmitted from the transmitting apparatus 10, performs necessary processing, and supplies the resulting received signal (carrier signal) to the demodulation IC 202-1. The tuners 201-2 to 201-4 perform necessary processing on the broadcast signal, similarly to the tuner 201-1, and supply the resulting reception signals to the demodulation ICs 202-2 to 202-4, respectively.

The demodulation IC 202-2 performs demodulation processing (for example, demodulation such as 64QAM or 256QAM) on the received signal supplied from the tuner 201-2, and supplies the resulting transmission stream to the demodulation IC 202-1. The demodulation IC 202-3 and the demodulation IC 202-4 perform demodulation processing on the received signal similarly to the demodulation IC 202-2, and supply the resulting transmission stream to the demodulation IC 202-1.

The demodulation IC 202-1 includes a control unit 210, a demodulation unit 211, TSMF processing units 212-1 to 212-4, a synthesis unit 213, a TLV conversion unit 214, a selector 215, and a selector 216. The demodulation IC 202-1 receives the received signal from the tuner 201-1 and the transmission streams from the demodulation ICs 202-2 to 202-4.

The control unit 210 controls the operation of each unit of the demodulation IC 202-1. For example, the control unit 210 includes a processor such as a microcontroller.

The demodulation unit 211 performs demodulation processing (for example, demodulation such as 64QAM or 256QAM) on the received signal from the tuner 201-1 and supplies the resulting transmission stream to the TSMF processing unit 212-1.

TSMF processing section 212-1 performs TSMF processing on TSMF packets with respect to the transmission stream supplied from demodulation section 211. In the TSMF process, for example, a process of detecting (a TSMF header of) a TSMF packet from a transmission stream extracted from a received signal (a signal of a carrier wave) or extracting extended information of the TSMF header is performed.

The TSMF processing unit 212-1 supplies the control unit 210 with a TSMF notification including a detection result of the TSMF packet (the TSMF header thereof) and header information (extended information) of the TSMF header. Further, the TSMF processing unit 212-1 supplies the transmission stream supplied from the demodulation unit 211 to the combining unit 213. Further, the TSMF processing unit 212-1 can extract and output a packet corresponding to the specified stream identifier and network identifier.

Similarly to the TSMF processing unit 212-1, the TSMF processing units 212-2 to 212-4 perform TSMF processing on the transmission stream from the external demodulation ICs 202-2 to 202-4, and include a TSMF including a detection result of a TSMF packet. The notification and the header information (extended information) of the TSMF header are supplied to the control unit 210, respectively. Further, the TSMF processing units 212-2 to 212-4 supply the transmission streams from the external demodulation ICs 202-2 to 202-4 to the combining unit 213, respectively.

The control unit 210 performs control for selecting an output stream to be output based on the header information (extended information) and the TSMF notification including the detection result of the TSMF packet supplied from the TSMF processing units 212-1 to 212-4. Do.

Here, the control unit 210 determines whether or not (the output format of) the transmission stream is the stream to be synthesized based on the TSMF notification including the detection result of the TSMF packet. The control unit 210 supplies a control signal corresponding to the determination result of the stream to be combined to the selector 216.

(4) The control unit 210 determines whether the stream type (stream format) of the transmission stream is “TLV” or “TS” based on the extended information of the TSMF header. The control unit 210 supplies a control signal corresponding to the determination result of the stream type to the selector 215.

The combining unit 213 combines the transmission streams supplied from the TSMF processing units 212-1 to 212-4, and converts the combined stream (divided TLV stream or TS stream) obtained as a result of the combining into the TLV conversion unit 214 or the selector 215. To supply.

Note that among the composite streams, the divided TLV stream has "TLV" specified as its stream type and is a TLV conversion target stream. On the other hand, the TS stream has "TS" specified as its stream type, and is a stream not subject to TLV conversion.

The TLV conversion target stream is input to the TLV conversion unit 214. The TLV conversion unit 214 converts a divided TLV packet included in the TLV conversion target stream (TLV stream) into a TLV packet. At this time, since the stream type is “TLV”, the selector 215 selects the output side of the TLV conversion unit 214 as an input based on the control signal from the control unit 210, and the TLV from the TLV conversion unit 214 The conversion target stream (TLV stream) is input to the selector 215 and output to the selector 216.

On the other hand, the stream not subject to TLV conversion (TS stream) is directly input to the selector 216. At this time, since the stream type is “TS”, the selector 215 has selected the output side of the synthesizing unit 213 as its input based on the control signal from the control unit 210, and the TLV conversion from the synthesizing unit 213 is not performed. The target stream (TS stream) is directly input to the selector 215 and output to the selector 216.

The selector 216, based on a control signal from the control unit 210, performs a non-combination target stream input from the demodulation unit 211 or the TSMF processing unit 212-1 or a synthesis target stream (TLV conversion target stream or TLV conversion non-target stream) is selected and output to the system-on-chip 203 as an output stream to be output.

The system-on-chip 203 performs predetermined processing such as decoding on the output stream input from the (deselector 216 of) the demodulation IC 202-1, and outputs the resulting video data (or image data) to the display 204. Output.

The display 204 is a display device (display device) such as a liquid crystal display (LCD: Liquid Crystal Display) or an organic EL display (OLED: Organic Light Emitting Diode). The display 204 displays a video (or image) corresponding to video data (or image data) input from the system-on-chip 203.

Although not shown in FIG. 10 for convenience of explanation, by providing a sound output device such as a speaker, a sound (sound) corresponding to the sound data processed by the system-on-chip 203 can be generated. You may make it output from a sound output device.

The receiving device 20 is configured as described above.

(Example of table)
FIG. 11 is a diagram illustrating an example of a reception setting, a determination criterion, and an automatic output selection according to a transmission method of a cable television.

In FIG. 11, reception settings, determination criteria, and automatic output selection are listed for each cable television transmission system, and tables A to H are assigned correspondingly.

Each transmission method depends on whether it is a single TS or multiple TSs defined by the provisions of standards and operation specifications, etc., whether it is multiple carriers, or whether it is single QAM or multiple QAM. Specified.

(4) The reception setting indicates whether ID designation of a stream identifier (stream_id) and a network identifier (original_network_id) is necessary or unnecessary. The criterion indicates the presence / absence of a TSMF header of the TSMF packet and the presence / absence of extension information of the header information.

The automatic output selection indicates whether the output format is a stream to be combined or a stream not to be combined, and whether the stream format is a stream to be converted or a stream not to be converted.

As the standard A, for example, the standard for digital cable television broadcasting formulated by the Japan Cable Television Engineering Association, etc., corresponds to the single TS multiplexing device standard, the multiple TS multiplexing device standard, and the multi-carrier transmission. System standards and the like are specified.

The operation specification B corresponds to, for example, a transmodulation operation specification formulated by the Japan Cable Laboratory, and a single QAM modulation scheme or a multiple QAM modulation scheme is specified.

Here, when the single TS method is adopted by combining the standard A and the operation specification B, the number of carriers is "1", the multiplexing method is "single TS", and the method of multiple TS is adopted. In this case, the number of carriers is "1" and the multiplexing method is "multiple TSs". In the following description, the former method is referred to as a table A method, and the latter method is referred to as a table B method.

Also, when a single QAM method is adopted with a plurality of carriers by a combination of the standard A and the operation specification B, the number of carriers is "1", the multiplexing method is "divided TLV", and the Is adopted, the number of carriers is "1" and the multiplexing method is "divided TLV" or "TS". In the following description, the former method is referred to as a table C method, and the latter method is referred to as a table D or table E method.

Further, when the multi-carrier and multi-QAM method is adopted by combining the standard A and the operation specification B, the number of carriers is "2 to 4" and the multiplexing method is "divided TLV". When a carrier method is adopted, the number of carriers is "2 to 4", and the multiplexing method is "divided TLV" or "TS". In the following description, the former method is referred to as a table F method, and the latter method is referred to as a table G or table H method.

方式 In the method of Table A, the number of carriers is “1”, the multiplexing method is “single TS”, and the following conditions are applied as reception settings, judgment criteria, and automatic output selection. That is, the ID designation of stream_id and original_network_id is "unnecessary" as the reception setting. In addition, since no TSMF header is added as a criterion, the extension information (number_of_carriers, stream_type) is set to “absent”. Furthermore, as automatic output selection, synthesis and TLV conversion are "non-target".

方式 In the method of Table B, the number of carriers is “1”, the multiplexing method is “multiple TSs”, and the stream designations “stream_id” and “original_network_id” are specified as “required” as reception settings. Further, although a TSMF header is added as a criterion, the extension information (number_of_carriers, stream_type) is set to “absent”. Furthermore, as automatic output selection, synthesis and TLV conversion are "non-target".

In the TSMF header, the area is extended using private_data in order to arrange the extension information. When all the bits of the private_data are "1" or "0", it is determined that the extension information is "absent". Can be determined.

方式 In the method of Table C, the number of carriers is “1”, the multiplexing method is “split TLV”, and the ID designation of stream_id and original_network_id is “necessary” as the reception setting. As a criterion, a TSMF header is added and includes extended information. As the extended information, number_of_carriers = “1” and stream_type = “0” are specified. Furthermore, as automatic output selection, synthesis and TLV conversion are "target".

方式 In the method of Table D, the number of carriers is “1”, the multiplexing method is “split TLV and TS”, and the ID designation of stream_id and original_network_id is “necessary” as the reception setting. As a criterion, a TSMF header is added and includes extended information. As the extended information, number_of_carriers = “1” and stream_type = “0” are specified. Furthermore, as automatic output selection, synthesis and TLV conversion are "target".

方式 In the method of Table E, the number of carriers is “1”, the multiplexing method is “split TLV and TS”, and the stream designations “stream_id” and “original_network_id” are specified as “required” as the reception setting. As a criterion, a TSMF header is added and includes extended information. As the extended information, number_of_carriers = “1” and stream_type = “1” are specified. Further, as the automatic output selection, the combination is set to “target”, and the TLV conversion is set to “non-target”.

方式 In the method of Table F, the number of carriers is “2 to 4”, the multiplexing method is “split TLV”, and the stream setting “stream_id” and “original_network_id” are “necessary” as the reception setting. As a criterion, a TSMF header is added and includes extended information. As the extended information, number_of_carriers = “2 to 4” and stream_type = “0” are specified. Furthermore, as automatic output selection, synthesis and TLV conversion are "target".

方式 In the method of Table G, the number of carriers is “2 to 4”, the multiplexing method is “split TLV and TS”, and the stream designations “stream_id” and “original_network_id” are specified as “required” as the reception setting. As a criterion, a TSMF header is added and includes extended information. As the extended information, number_of_carriers = “2 to 4” and stream_type = “0” are specified. Furthermore, as automatic output selection, synthesis and TLV conversion are "target".

方式 In the method of Table H, the number of carriers is “2 to 4”, the multiplexing method is “split TLV and TS”, and the ID designation of stream_id and original_network_id is “necessary” as the reception setting. As a criterion, a TSMF header is added and includes extended information. As the extended information, number_of_carriers = “2 to 4” and stream_type = “1” are specified. Further, as the automatic output selection, the combination is set to “target”, and the TLV conversion is set to “non-target”.

(Example of TS / TLV discrimination)
FIG. 12 is a diagram illustrating an example of channel selection and TS / TLV discrimination.

The stream type is identified by the stream_type included in the extended information of the TSMF header, but only when the combination of multiple carriers is established (successful) in the case of using the method of Tables C to H, ie, the multiple carrier transmission method. But sometimes an error.

First, when the multi-carrier transmission scheme is adopted, when stream_type_ = “0” is specified, the stream type is recognized as a TLV packet, and the order and total number of carriers (carrier_sequence, number_of_carriers) are checked. When it is determined that combining is possible, multi-carrier combining is established. In the following description, such a case is referred to as a table a case.

Second, in the case of adopting the multi-carrier transmission scheme, when stream_type = “1” is specified, the stream type is recognized as a TS packet, and it can be combined by checking the order and total number of carriers. When determined, multi-carrier synthesis is established. In the following description, such a case is referred to as a table b case.

Third, in the case of employing the multi-carrier transmission scheme, the stream_type = is undefined as “1” or “0”, and the stream type is recognized as a single TS or a plurality of TSs. And it is determined that combining is impossible, an error occurs in multi-carrier combining. Hereinafter, such a case is referred to as a case of the table c.

In the following description, for convenience of explanation, the method of tables A to H shown in FIG. 11 and the case of tables a to c shown in FIG. It shall be described in. However, in the notation of “method of table xy”, “x” corresponds to any of “A” to “H” in the method of tables A to H in FIG. 11, and “y” corresponds to FIG. Correspond to any of "a" to "c" in the cases of tables a to c. In addition, when the case does not correspond to the cases of the tables a to c in FIG. 12, the notation “−y” is omitted.

(1) Table A method

(Example of carrier wave)
FIG. 13 is a diagram illustrating an example of carrier waves when the method of Table A is adopted.

As shown in FIG. 13, when the condition of the table A is satisfied, one carrier C1 is received by the receiving device 20. The carrier C1 includes a single transport stream (single TS) as a transmission stream, and does not include a TSMF packet. That is, in the method of Table A, the transmission stream does not include (the TSMF header of) the TSMF packet, and the header information does not include the extension information.

(Signal flow)
FIG. 14 is a diagram showing an example of a signal flow in the demodulation IC 202-1 when the method of Table A is adopted.

In FIG. 14, the configuration of the demodulation IC 202-1 in the receiver 20 is extracted and shown, and the flow of signals is indicated by the thick arrows in the figure. The meanings shown in the drawings are the same in other corresponding diagrams (diagrams showing examples of signal flows) described later.

The demodulation unit 211 performs demodulation processing on the received signal input thereto and supplies the resulting transmission stream (single TS) to the TSMF processing unit 212-1. In the case of the method of Table A, since one carrier C1 is received, a transmission stream is input only to the TSMF processing unit 212-1 among the TSMF processing units 212-1 to 212-4.

The TSMF processing unit 212-1 performs TSMF processing on the transmission stream (single TS) from the demodulation unit 211 and attempts to detect a TSMF packet. At this time, since the TSMF processing unit 212-1 cannot detect a TSMF packet from a single transport stream, the TSMF processing unit 212-1 supplies the control unit 210 with a TSMF notification indicating that a TSMF packet has not been detected.

The control unit 210 determines that the transmission stream (single TS) is a non-combined stream based on the TSMF notification (notification of no detection of the TSMF packet) from the TSMF processing unit 212-1, and the determination result Is supplied to the selector 216.

The selector 216 selects a transmission stream (single TS) as a non-combination target stream input from the demodulation unit 211 based on a control signal from the control unit 210, and selects a subsequent system on stream as an output target output stream. Output to chip 203.

As described above, when the method of Table A is adopted, the transmission stream (single TS) transmitted by one carrier C1 does not include (the TSMF header of) a TSMF packet. The single transport stream extracted from the received signal of the carrier C1 is selected as a non-combination target stream and output as an output stream.

(2) Table B method

(Example of carrier wave)
FIG. 15 is a diagram illustrating an example of a carrier wave when the method of Table B is adopted.

場合 As shown in FIG. 15, when the condition of the table B is satisfied, one carrier C1 is received by the receiving device 20. The carrier C1 includes a plurality of transport streams (a plurality of TSs) and includes a TSMF packet, but does not include extended information in a TSMF header.

{Circle around (4)} The plurality of TSs include streams of program A, program B, and program C. The stream of program A is assigned stream_id "=“ 0x11 ”as a stream identifier and original_network_id =“ 0x22 ”as a network identifier. Also, stream_id = “0x33” and original_network_id = “0x44” are assigned to the stream of program B, and stream_id = “0x55” and original_network_id = “0x66” are assigned to the stream of program C.

{That is, in the method of Table B, the transmission stream includes (the TSMF header of) the TSMF packet, but does not include the extended information in the header information.

(Signal flow)
FIG. 16 is a diagram illustrating an example of a signal flow in the demodulation IC 202-1 when the method of Table B is adopted.

In the case of the method of Table B, the carrier C1 includes streams of program A, program B, and program C as a plurality of TSs. Here, stream_id is used as identification information for identifying an output stream to be output. = “0x11” and original_network_id = “0x22” are specified, and are set in the control unit 210 and the TSMF processing unit 212.

The demodulation unit 211 performs demodulation processing on the received signal input thereto and supplies the resulting transmission stream (multiple TSs) to the TSMF processing unit 212-1. In the case of the method of Table B, since one carrier C1 is received, a transmission stream is input only to the TSMF processing unit 212-1.

The TSMF processing unit 212-1 performs TSMF processing on the transmission stream (multiple TSs) from the demodulation unit 211, and a TSMF packet in which stream_id = “0x11” and original_network_id = “0x22” are specified in the header information of the TSMF header. Try to detect. At this time, the TSMF processing unit 212-1 can detect the TSMF packet from the plurality of transport streams, but since the TSMF header does not include the extended information, the TSMF packet is detected and the fact that the extended information is not present. Is supplied to the control unit 210. Further, the TSMF processing unit 212-1 extracts and outputs a transmission stream (a stream of the program A) identified by stream_id = “0x11” and original_network_id = “0x22”.

Based on the TSMF notification (TSMF packet detection and notification of the absence of extended information) from TSMF processing section 212-1, control section 210 determines whether the transmission stream (multiple TSs) is It is determined that the received signal is a TS, and a control signal corresponding to the determination result is supplied to the selector 216.

The selector 216 selects, based on a control signal from the control unit 210, a transmission stream (program A stream) that is a non-composite stream input from the TSMF processing unit 212-1 and is a plurality of TSs, and outputs The data is output to the system-on-chip 203 as a stream.

As described above, when the method of Table B is adopted, the transmission stream (plural TSs) transmitted by one carrier C1 includes TSMF packets, but does not include extension information in the header information of the TSMF header. In -1, a plurality of transport streams extracted from the received signal of the carrier C1 are selected as a non-combination target stream and a plurality of TSs, and output as an output stream.

(3) Table Ca method

(Example of carrier wave)
FIG. 17 is a diagram illustrating an example of carrier waves when the method of Table Ca is adopted.

場合 As shown in FIG. 17, when the condition of the table Ca is satisfied, one carrier C1 is received by the receiving device 20. The carrier wave C1 includes a transmission stream (TLV) including a divided TLV packet, includes a TSMF packet, and further includes extension information in the TSMF header.

{That is, in the method of Table Ca, the transmission stream (TLV) includes (a TSMF header of) a TSMF packet, and the header information includes extended information. In this extended information, "TLV" is designated as the stream type.

(Signal flow)
FIG. 18 is a diagram showing an example of a signal flow in the demodulation IC 202-1 when the method of Table Ca is adopted.

The demodulation unit 211 performs demodulation processing on the received signal input thereto, and supplies the resulting transmission stream (TLV) to the TSMF processing unit 212-1. In the case of the method of the table Ca, since one carrier C1 is received, a transmission stream (TLV) is input only to the TSMF processing unit 212-1.

(4) The TSMF processing unit 212-1 performs a TSMF process on the transmission stream (TLV) from the demodulation unit 211 and attempts to detect a TSMF packet. At this time, the TSMF processing unit 212-1 detects the TSMF packet from the transmission stream (TLV) including the divided TLV packet, and can extract the extended information from the TSMF header. , And supplies the extracted extended information (header information) to the control unit 210. Further, the TSMF processing unit 212-1 supplies the transmission stream (TLV) from the demodulation unit 211 to the synthesizing unit 213.

The combining unit 213 removes TSMF packets included in the transmission stream (TLV) input from the TSMF processing unit 212-1 and supplies the resulting divided TLV stream to the TLV conversion unit 214. The TLV conversion unit 214 processes the divided TLV stream input from the synthesis unit 213, and converts the divided TLV packets into TLV packets.

The control unit 210 determines that the transmission stream (TLV) is the stream to be synthesized based on the TSMF notification (detection of the TSMF packet and notification of the existence of the extended information) from the TSMF processing unit 212-1. A control signal corresponding to the result is supplied to the selector 216. Further, the control unit 210 determines that the transmission stream (TLV) is the TLV conversion target stream based on the extended information (stream type: “TLV”) from the TSMF processing unit 212-1, and includes The corresponding control signal is supplied to the selector 215.

The selector 215 selects a TLV conversion target stream (TLV stream) input from the TLV converter 214 based on a control signal from the controller 210, and supplies the stream to the selector 216. The selector 216 selects a TLV conversion target stream (TLV stream) input from the selector 215 based on a control signal from the control unit 210, and outputs the stream to the system-on-chip 203 as an output stream.

As described above, when the method of Table Ca is adopted, the transmission stream (TLV) transmitted by one carrier C1 includes a TSMF packet, and the TSMF header has the extension information (stream type: “TLV”). ), The demodulation IC 202-1 selects the transmission stream (TLV) extracted from the received signal of the carrier C1 as the stream to be combined and also the stream to be TLV-converted and outputs the stream. Output as a stream.

(4) Method of table Da

(Example of carrier wave)
FIG. 19 is a diagram illustrating an example of carrier waves when the method of Table Da is adopted.

As shown in FIG. 19, when the condition of the table Da is satisfied, one carrier C1 is received by the receiving device 20. The carrier wave C1 includes two types of transmission streams (TLV / TS): a transmission stream (TLV) and a transmission stream (TS).

The transmission stream (TLV) includes a TSMF packet, and further includes extension information in the TSMF header. The transmission stream (TLV) is assigned stream_id = “0x11” as a stream identifier and original_network_id = “0x22” as a network identifier.

The transmission stream (TS) includes a TSMF packet, and further includes extension information in the TSMF header. In addition, stream_id = stream “0x33” is assigned to the transmission stream (TS) as a stream identifier, and original_network_id = “0x44” is assigned as a network identifier.

{That is, in the method of Table Da, each of the two types of transmission streams (TLV / TS) includes (a TSMF header of) a TSMF packet, and the header information includes extended information. In the extended information, “TLV” or “TS” is designated as the stream type for each transmission stream.

(Signal flow)
FIG. 20 is a diagram showing an example of a signal flow in the demodulation IC 202-1 when the method of Table Da is adopted.

In the case of the method of Table Da, the carrier C1 includes two types of transmission streams (TLV / TS), that is, a transmission stream (TLV) and a transmission stream (TS). Stream_id = “0x11” and original_network_id = “0x22” are specified as identification information for identification, and are set in the control unit 210 and the TSMF processing unit 212.

The demodulation unit 211 performs demodulation processing on the received signal input thereto, and supplies the resulting transmission stream (TLV / TS) to the TSMF processing unit 212-1. In the case of the method of Table Da, since one carrier C1 is received, the transmission stream (TLV / TS) is input only to the TSMF processing unit 212-1.

The TSMF processing unit 212-1 performs TSMF processing on the transmission stream (TLV / TS) from the demodulation unit 211 based on the set identification information, and uses stream_id = “0x11” and original_network_id in the header information of the TSMF header. = Attempt to detect TSMF packets with "0x22" specified.

At this time, the TSMF processing unit 212-1 detects a TSMF packet to be detected from the transmission stream (TLV), and extracts extension information from the TSMF header. The TSMF processing unit 212-1 supplies the control unit 210 with a TSMF notification indicating that a TSMF packet has been detected and the extracted extended information (header information). In addition, the TSMF processing unit 212-1 supplies the transmission stream (TLV) identified by stream_id = “0x11” and original_network_id = “0x22” to the combining unit 213.

As described above, when the method of Table Da is adopted, the demodulation IC 202-1 sets the identification information (stream_id) of the two types of transmission streams (TLV / TS) transmitted by one carrier C1. = “0x11”, original_network_id = 0x22 ”), a transmission stream (TLV) including (a TSMF header of) a TSMF packet is selected as a stream to be synthesized, and the TSMF header is further extended information (stream type). : “TLV”), it is also selected as a TLV conversion target stream and output as an output stream.

(5) Method of table Eb

(Example of carrier wave)
FIG. 21 is a diagram illustrating an example of a carrier wave when the method of the table Eb is adopted.

場合 As shown in FIG. 21, when the condition of the table Eb is satisfied, one carrier C1 is received by the receiving device 20. The carrier C1 includes a transmission stream (TLV) and a transmission stream (TS).

In the method of Table Eb, similarly to the method of Table Da described above (FIG. 19), stream_id = “0x11” and original_network_id = “0x22” are assigned to the transmission stream (TLV), respectively. The stream (TS) is assigned stream_id = “0x33” and original_network_id = “0x44”, respectively.

{That is, in the method of Table Eb, each of the two types of transmission streams (TLV / TS) includes (a TSMF header of) a TSMF packet, and the header information includes extended information. In the extended information, “TLV” or “TS” is designated as the stream type for each transmission stream.

(Signal flow)
FIG. 22 is a diagram showing an example of a signal flow in the demodulation IC 202-1 when the method of the table Eb is adopted.

In the case of the method of the table Eb, the carrier C1 includes two types of streams (TLV / TS). Here, as the identification information for identifying the output stream to be output, stream_id 識別する = 出力 “0x33” And original_network_id = “0x44”, respectively, and are set in the control unit 210 and the TSMF processing unit 212.

The demodulation unit 211 performs demodulation processing on the received signal input thereto, and supplies the resulting transmission stream (TLV / TS) to the TSMF processing unit 212-1. In the case of the method of the table Eb, since one carrier C1 is received, the transmission stream (TLV / TS) is input only to the TSMF processing unit 212-1.

The TSMF processing unit 212-1 performs TSMF processing on the transmission stream (TLV / TS) from the demodulation unit 211 based on the set identification information, and uses stream_id = “0x33” and original_network_id in the header information of the TSMF header. = Attempt to detect TSMF packets with "0x44" specified.

At this time, the TSMF processing unit 212-1 detects a TSMF packet to be detected from the transmission stream (TS), and extracts extension information from the TSMF header. The TSMF processing unit 212-1 supplies the control unit 210 with a TSMF notification indicating that a TSMF packet has been detected and the extracted extended information (header information). Further, the TSMF processing unit 212-1 supplies the transmission stream (TS) identified by stream_id = “0x33” and original_network_id = “0x44” to the combining unit 213.

The combining unit 213 removes a TSMF packet included in the stream (TS) input from the TSMF processing unit 212-1.

The control unit 210 determines that the transmission stream (TS) is the stream to be synthesized based on the TSMF notification (detection of the TSMF packet and notification of the presence of the extended information) from the TSMF processing unit 212-1. A control signal corresponding to the result is supplied to the selector 216. Further, the control unit 210 determines that the transmission stream (TS) is a non-TLV-converted stream based on the extended information (stream type: “TS”) from the TSMF processing unit 212-1, and the determination result Is supplied to the selector 215.

The selector 215 selects a non-TLV conversion target stream (TS stream) input from the synthesizing unit 213 based on the control signal from the control unit 210, and supplies the stream to the selector 216. The selector 216 selects a non-TLV conversion target stream (TS stream) input from the selector 215 based on a control signal from the control unit 210, and outputs the stream to the system-on-chip 203.

As described above, when the method of Table Eb is adopted, the demodulation IC 202-1 uses the set identification information (stream_id) of the two types of transmission streams (TLV / TS) transmitted by one carrier C1. = “0x33”, original_network_id = “0x44”), a transmission stream (TS) including (a TSMF header of) a TSMF packet is selected as a stream to be synthesized, and the TSMF header is further extended information (stream type : "TS"), it is also selected as a non-TLV conversion target stream and output as an output stream.

(6) Table Fa method

(Example of carrier wave)
FIG. 23 is a diagram illustrating an example of carrier waves when the method of Table Fa is adopted.

場合 As shown in FIG. 23, when the condition of the table Fa is satisfied, the four carriers C1 to C4 are received by the receiving device 20. Each carrier of the carriers C1 to C4 includes a transmission stream (TLV). Each transmission stream (TLV) includes a TSMF packet, and further includes extension information in the TSMF header.

Of the carriers C1 to C4, three of the carriers C1, C2, and C4 are the carriers to be combined, and stream_id 合成 = “0x11” and original_network_id = “0x22” are assigned as common identification information. . On the other hand, one of the carrier waves C3 among the carrier waves C1 to C4 is not subjected to synthesis, and stream_id = “0x33” and original_network_id = “0x44” are assigned as unique identification information.

That is, in the method of Table Fa, each of the transmission streams (TLV) transmitted by the carrier waves C1 to C4 includes (a TSMF header of) a TSMF packet, and the header information includes extension information. .

In addition, in this extended information, “TLV” is commonly designated as a stream type for each carrier, while a unique value is designated for each carrier as the order and total number of carriers. For example, in the extended information of the carrier C1, "1" and "3" are designated as the order and the total number of the carriers, respectively. For example, as the order and the total number of the carrier waves, “2” and “3” are respectively specified in the extended information of the carrier C2, and “3” and “3” are respectively designated in the extended information of the carrier C4. You.

(Signal flow)
FIG. 24 is a diagram showing an example of a signal flow in the demodulation IC 202-1 when the method of Table Fa is adopted.

In the case of the method of Table Fa, the four carrier waves C1 to C4 each include a transmission stream (TVL). In this case, as the identification information for identifying the output stream to be output, stream_id = “0x11 "And original_network_id =" 0x22 "are specified, and are set in the control unit 210 and the TSMF processing unit 212.

伝送 The transmission stream (TLV) included in the first carrier C1 is input to the TSMF processing unit 212-1 via the demodulation unit 211. The TSMF processing unit 212-1 performs TSMF processing on the transmission stream (TLV) from the demodulation unit 211 based on the set identification information, and uses stream_id = “0x11” and original_network_id = ”in the header information of the TSMF header. Attempt to detect TSMF packets with "0x22" specified.

At this time, the TSMF processing unit 212-1 detects a TSMF packet to be detected from the transmission stream (TLV), and extracts extension information from the TSMF header. The TSMF processing unit 212-1 supplies the control unit 210 with a TSMF notification indicating that a TSMF packet has been detected and the extracted extended information (header information).

Here, in the extended information obtained from the carrier C1, stream_type = “TLV” is designated as the stream type, carrier_sequence = “1” is assigned as the carrier order, and number_of_carriers = “3” is assigned as the total number of carriers. . In addition, the TSMF processing unit 212-1 supplies the transmission stream (TLV) identified by stream_id = “0x11” and original_network_id = “0x22” to the combining unit 213.

The transmission stream (TLV) included in the second carrier wave C2 is input from the external demodulation IC 202-2 to the TSMF processing unit 212-2. The TSMF processing unit 212-2 attempts to detect a TSMF packet in which stream_id = “0x11” and original_network_id = “0x22” are specified based on the set identification information. Then, the TSMF processing unit 212-2 supplies the control unit 210 with the TSMF notification indicating that the TSMF packet has been detected and the extracted extended information (header information).

Here, the extended information obtained from the carrier C2 specifies stream_type = “TLV”, carrier_sequence = “2”, and number_of_carriers 拡張 = “3”. Further, the TSMF processing unit 212-2 supplies the transmission stream (TLV) identified by stream_id = “0x11” and original_network_id = “0x22” to the combining unit 213.

The transmission stream (TLV) included in the third carrier C3 is input from the external demodulation IC 202-3 to the TSMF processing unit 212-3. The TSMF processing unit 212-3 attempts to detect a TSMF packet based on the set identification information. Here, since a TSMF packet in which stream_id = “0x33” and original_network_id = “0x44” are detected, the TSMF processing unit 212-3 detects that the TSMF packet is present and the absence of the target extended information. And the extracted extended information (header information) to the control unit 210.

The transmission stream (TLV) included in the fourth carrier wave C4 is input from the external demodulation IC 202-4 to the TSMF processing unit 212-4. The TSMF processing unit 212-4 attempts to detect a TSMF packet in which stream_id = “0x11” and original_network_id = “0x22” are specified based on the set identification information. Then, the TSMF processing unit 212-4 supplies the control unit 210 with the TSMF notification indicating that the TSMF packet has been detected and the extracted extended information (header information).

Here, the extended information obtained from the carrier C4 specifies stream_type = “TLV”, carrier_sequence = “3”, and number_of_carriers = “3”. Further, the TSMF processing unit 212-4 supplies the transmission stream (TLV) identified by stream_id = “0x11” and original_network_id = “0x22” to the combining unit 213.

The control unit 210 converts the header from the TSMF header identified by stream_id = “0x11” and original_network_id = “0x22” in (the TSMF header of) the TSMF packets processed by the TSMF processing units 212-1 to 212-4. Extract information (for example, extended information). Here, the carrier including the TSMF header identified by stream_id = “0x11” and original_network_id = “0x22” is three waves of the first carrier C1, the second carrier C2, and the fourth carrier C4. It is.

The control unit 210 checks the order and the total number of carrier waves based on the extracted header information (combined information of the three pieces of extended information). Here, the order of the carrier waves (carrier_sequence) is "1", "2", "3" and there is no duplication or shortage, and the total number of carrier waves (number_of_carriers) is "3" for all three waves. , And all of them have the same value and coincide with the total number and can be combined. Therefore, the control unit 210 determines that the transmission stream (TLV) corresponding to the three waves (carriers C1, C2, and C4) is the stream to be combined. And a control signal corresponding to the result of the determination is supplied to the selector 216.

{Circle around (4)} The control unit 210 checks the stream type specified in the extracted header information (extended information of three waves). Here, since stream_type = stream “TLV” is specified for all three waves, the control unit 210 determines that the transmission stream (TLV) corresponding to the three waves (carriers C1, C2, C4) is the stream to be TLV-converted. And a control signal corresponding to the result of the determination is supplied to the selector 215.

The combining unit 213 combines the transmission streams (TLVs) input from the TSMF processing unit 212-1, the TSMF processing unit 212-2, and the TSMF processing unit 212-4, and obtains a combined stream (divided TLV stream) obtained as a result. ) Is supplied to the TLV converter 214. The TLV conversion unit 214 processes the divided TLV stream input from the synthesis unit 213, and converts the divided TLV packets into TLV packets.

As described above, when the method of Table Fa is adopted, the demodulation IC 202-1 uses the set identification information (stream_id = ”) in the transmission stream (TLV) transmitted by the four waves of the carrier waves C1 to C4. 0x11 ", original_network_id ==" 0x22 "), a three-wave transmission stream (TLV) including (a TSMF header of) a TSMF packet (however, in the combined information of the three-wave extended information, the order of the carrier waves and the total number match. Is selected as a stream to be synthesized, and since the TSMF header further includes extended information (stream type: "TLV"), the stream is also selected as a stream to be converted and output as an output stream. Is done.

(7) Method of table Fc

(Example of carrier wave)
FIG. 25 is a diagram illustrating an example of carrier waves when the method of Table Fc is adopted.

場合 As shown in FIG. 25, when the condition of the table Fc is satisfied, the three carrier waves C1 to C3 are received by the receiving device 20. Each of the carriers C1 to C3 includes a transmission stream (TLV). Each transmission stream (TLV) includes a TSMF packet, and further includes extension information in the TSMF header.

{Circle around (1)} All the carriers C1 to C3 are the carriers to be combined, and stream_id = “0x11” and original_network_id = “0x22” are assigned as common identification information.

{That is, in the method of Table Fc, the transmission stream (TLV) transmitted by the carrier waves C1 to C3 includes (the TSMF header of) the TSMF packet, and the header information includes extension information.

Also, in this extended information, “TLV” is commonly designated as the stream type for each carrier, while a unique value is designated for each carrier as the order and total number of carriers. For example, as the order and total number of carriers, "1" and "3" are used for the extended information of the carrier C1, "1" and "3" are used for the extended information of the carrier C2, and "2" is used for the extended information of the carrier C3. "," "3" are specified respectively.

(Signal flow)
FIG. 26 is a diagram showing an example of a signal flow in the demodulation IC 202-1 when the method of Table Fc is adopted.

In the case of the method of Table Fc, the three carrier waves C1 to C3 each include a transmission stream (TLV). Here, stream_id = “0x11” is used as identification information for identifying an output stream to be output. "And original_network_id =" 0x22 "are specified, and are set in the control unit 210 and the TSMF processing unit 212.

At this time, the TSMF processing unit 212-1 detects a TSMF packet to be detected from the transmission stream (TLV), and extracts extension information from the TSMF header. The TSMF processing unit 212-1 supplies the control unit 210 with a TSMF notification indicating that a TSMF packet has been detected and the extracted extended information (header information). Here, in the extended information obtained from the carrier C1, stream_typese = “TLV”, carrier_sequence = “1”, and number_of_carriers = “3” are respectively specified.

The transmission stream (TLV) included in the second carrier wave C2 is input from the external demodulation IC 202-2 to the TSMF processing unit 212-2. The TSMF processing unit 212-2 attempts to detect a TSMF packet in which stream_id = “0x11” and original_network_id = “0x22” are specified based on the set identification information. Then, the TSMF processing unit 212-2 supplies the control unit 210 with the TSMF notification indicating that the TSMF packet has been detected and the extracted extended information (header information). Here, stream_type 情報 = “TLV”, carrier_sequence = “1”, and number_of_carriers = “3” are specified in the extended information obtained from the carrier C2.

The transmission stream (TLV) included in the third carrier C3 is input from the external demodulation IC 202-3 to the TSMF processing unit 212-3. The TSMF processing unit 212-3 attempts to detect a TSMF packet in which stream_id = “0x11” and original_network_id = “0x22” are specified based on the set identification information. Then, the TSMF processing unit 212-3 supplies the control unit 210 with the TSMF notification indicating that the TSMF packet has been detected and the extracted extended information (header information). Here, stream_type 情報 = “TLV”, carrier_sequence = “2”, and number_of_carriers = “3” are specified in the extended information obtained from the carrier C3.

The control unit 210 converts header information (for example, extended information) from the TSMF headers identified by stream_id = “0x11” and original_network_id = “0x22” in the TSMF headers processed by the TSMF processing units 212-1 to 212-3. ) To extract. Here, the carrier including the TSMF header identified by stream_id = “0x11” and original_network_id = “0x22” is three waves of the first carrier C1, the second carrier C2, and the third carrier C3. It is.

The control unit 210 checks the order and the total number of carrier waves based on the extracted header information (combined information of the three pieces of extended information). Here, the order of the carrier waves (carrier_sequence) is “1”, “1”, “2”, and “1” is duplicated and cannot be combined. It is determined that the transmission stream (TLV) obtained is a non-combination target stream, and a control signal corresponding to the determination result is supplied to the selector 216.

The selector 216 selects a transmission stream (TLV) as a non-combination stream input from the demodulation unit 211 based on a control signal from the control unit 210, and outputs the selected stream as an output stream to the system-on-chip 203.

As described above, when the method of Table Fc is adopted, the demodulation IC 202-1 converts the transmission stream (TLV) transmitted by the three waves of the carrier waves C1 to C3 into the set identification information (stream_id = “0x11 Although a TSMF packet identified by “, original_network_id_ =“ 0x22 ”) is included, the order and total number of carrier waves are not matched in the combined information of the three pieces of extended information, so that one carrier wave A transmission stream (TLV) of (for example, the carrier wave C1) is selected as a non-combination target stream and output as an output stream.

(8) Table Ga method

(Example of carrier wave)
FIG. 27 is a diagram illustrating an example of carrier waves when the method of Table Ga is adopted.

場合 As shown in FIG. 27, when the conditions of the table Ga are satisfied, the two carriers C1 and C2 are received by the receiving device 20. Each carrier of the carriers C1 and C2 includes two types of transmission streams (TLV / TS): a transmission stream (TLV) and a transmission stream (TS). Each transmission stream includes a TSMF packet, and the TSMF header further includes extension information.

{Circle around (2)} The two waves C1 and C2 are carriers to be combined, and stream_id = “0x11” and original_network_id = “0x22” are assigned as identification information common to the transmission stream (TLV). On the other hand, stream_id = “0x33” and original_network_id = “0x44” are assigned to the transmission stream (TS) as common identification information.

That is, in the method of Table Ga, the transmission stream (TLV / TS) transmitted by the carrier waves C1 and C2 includes (the TSMF header of) the TSMF packet, and the header information includes the extension information. I have.

In addition, in the extension information of the transmission stream (TLV), “TLV” is commonly specified as the stream type for each carrier, while a unique value is specified for each carrier as the order and total number of carriers. For example, as the order and the total number of the carrier waves, "1" and "2" are designated as the extended information of the carrier C1, and "2" and "2" are designated as the extended information of the carrier C2. In the extended information of the transmission stream (TS), “TS” is commonly specified as the stream type for each carrier.

(Signal flow)
FIG. 28 is a diagram showing an example of a signal flow in the demodulation IC 202-1 when the method of the table Ga is adopted.

In the case of the method of Table Ga, the two carrier waves C1 and C2 each include a transmission stream (TLV / TS). Here, as the identification information for identifying the output stream to be output, stream_id = “0x11” and original_network_id = “0x22” are specified, and are set in the control unit 210 and the TSMF processing unit 212.

ストリーム The stream (TLV / TS) included in the first carrier C1 is input to the TSMF processing unit 212-1 via the demodulation unit 211. The TSMF processing unit 212-1 performs TSMF processing on the transmission stream (TLV / TS) from the demodulation unit 211 based on the set identification information, and uses stream_id = “0x11” and original_network_id in the header information of the TSMF header. = Attempt to detect TSMF packets with "0x22" specified.

Here, the extended information obtained from the carrier C1 specifies stream_type = “TLV”, carrier_sequence = “1”, and number_of_carriers = “2”, respectively. In addition, the TSMF processing unit 212-1 supplies the transmission stream (TLV) identified by stream_id = “0x11” and original_network_id = “0x22” to the combining unit 213.

ストリーム The stream (TLV / TS) included in the second carrier C2 is input from the external demodulation IC 202-2 to the TSMF processing unit 212-2. The TSMF processing unit 212-2 attempts to detect a TSMF packet in which stream_id = “0x11” and original_network_id = “0x22” are specified based on the set identification information. Then, the TSMF processing unit 212-2 supplies the control unit 210 with the TSMF notification indicating that the TSMF packet has been detected and the extracted extended information (header information).

Here, stream_type = 搬送 “TLV”, carrier_sequence = “2”, and number_of_carriers = “2” are specified in the extended information obtained from carrier C2. Further, the TSMF processing unit 212-2 supplies the transmission stream (TLV) identified by stream_id = “0x11” and original_network_id = “0x22” to the combining unit 213.

The control unit 210 controls the TSMF header identified by stream_id = “0x11” and original_network_id = “0x22” in (the TSMF header of) the TSMF packet processed by the TSMF processing unit 212-1 and the TSMF processing unit 212-2. , Header information (for example, extended information) is extracted. Here, the carrier including the TSMF header identified by stream_id = “0x11” and original_network_id = “0x22” is two waves of the first carrier C1 and the second carrier C2.

Based on the extracted header information (combined information of the two pieces of extended information), the control unit 210 checks the order and the total number of the carrier waves. Here, the order of the carrier waves (carrier_sequence) is "1", "2" and there is no overlap or shortage, and the total number of carrier waves (number_of_carriers) is "2" for all two waves, all of which are the same. Since the values match the total number and can be combined, the control unit 210 determines that the transmission stream (TLV) corresponding to the two waves (carriers C1 and C2) is the stream to be combined, and determines that. A control signal corresponding to the result is supplied to the selector 216.

{Circle around (4)} The control unit 210 checks the stream type specified in the extracted header information (two-wave extended information). Here, since stream_type = “TLV” is specified for all two waves, the control unit 210 determines that the transmission stream (TLV) corresponding to the two waves (carriers C1 and C2) is the stream to be TLV-converted. Then, a control signal corresponding to the determination result is supplied to the selector 215.

The combining unit 213 combines the transmission streams (TLV) input from the TSMF processing unit 212-1 and the TSMF processing unit 212-2, and converts the resulting combined stream (divided TLV stream) into the TLV conversion unit 214. To supply. The TLV conversion unit 214 processes the divided TLV stream input from the synthesis unit 213, and converts the divided TLV packets into TLV packets.

As described above, when the method of Table Ga is adopted, the demodulation IC 202-1 identifies the set identification among the two types of transmission streams (TLV / TS) transmitted by the two carriers C1 and C2. A transmission stream (TLV) including (a TSMF header of) a TSMF packet identified by the information (stream_id = “0x11”, original_network_id = “0x22”) is selected as a stream to be combined, and the TSMF header is further extended information. (Stream type: “TLV”), it is also selected as a TLV conversion target stream and output as an output stream.

(9) Table Hb method

(Example of carrier wave)
FIG. 29 is a diagram illustrating an example of carrier waves when the method of the table Hb is adopted.

As shown in FIG. 29, when the condition of the table Hb is satisfied, the two carriers C1 and C2 are received by the receiving device 20. Each carrier of the carriers C1 and C2 includes a transmission stream (TLV) and a transmission stream (TS), respectively. Each transmission stream includes a TSMF packet, and the TSMF header further includes extension information.

That is, in the method of Table Hb, the transmission stream (TLV / TS) transmitted by the carrier waves C1 and C2 includes (the TSMF header of) the TSMF packet, and the header information includes the extension information. I have.

In addition, in the extended information of the transmission stream (TS), “TS” is commonly designated as the stream type for each carrier, while a unique value is designated for each carrier as the order and total number of carriers. For example, as the order and the total number of the carrier waves, "1" and "2" are designated as the extended information of the carrier C1, and "2" and "2" are designated as the extended information of the carrier C2. In the extended information of the transmission stream (TLV), "TLV" is commonly specified as the stream type for each carrier.

(Signal flow)
FIG. 30 is a diagram showing an example of a signal flow in the demodulation IC 202-1 when the method of the table Hb is adopted.

In the case of the method of Table Hb, the two carriers C1 and C2 each include a transmission stream (TLV / TS). In this case, as the identification information for identifying the output stream to be output, stream_id = “0x33” and original_network_id = “0x44” are respectively specified, and are set in the control unit 210 and the TSMF processing unit 212.

ストリーム The stream (TLV / TS) included in the first carrier C1 is input to the TSMF processing unit 212-1 via the demodulation unit 211. The TSMF processing unit 212-1 performs TSMF processing on the transmission stream (TLV / TS) from the demodulation unit 211 based on the set identification information, and uses stream_id = “0x33” and original_network_id in the header information of the TSMF header. = Detects TSMF packets with "0x44" specified.

At this time, the TSMF processing unit 212-1 detects a TSMF packet to be detected from the transmission stream (TS), and extracts extension information from the TSMF header. The TSMF processing unit 212-1 supplies the control unit 210 with a TSMF notification indicating that a TSMF packet has been detected and the extracted extended information (header information).

Here, the extended information obtained from the carrier C1 specifies stream_type = “TS”, carrier_sequence = “1”, and number_of_carriers = “2”, respectively. Further, the TSMF processing unit 212-1 supplies the transmission stream (TS) identified by stream_id = “0x33” and original_network_id = “0x44” to the combining unit 213.

ストリーム The stream (TLV / TS) included in the second carrier C2 is input from the external demodulation IC 202-2 to the TSMF processing unit 212-2. The TSMF processing unit 212-2 attempts to detect a TSMF packet in which stream_id = “0x33” and original_network_id = “0x44” are specified based on the set identification information. Then, the TSMF processing unit 212-2 supplies the control unit 210 with the TSMF notification indicating that the TSMF packet has been detected and the extracted extended information (header information).

Here, the extended information obtained from the carrier C2 specifies stream_type = “TS”, carrier_sequence = “2”, and number_of_carriers = “2”. Further, the TSMF processing unit 212-2 supplies the transmission stream (TS) identified by stream_id = 0 “0x33” and original_network_id = “0x44” to the combining unit 213.

The control unit 210 controls the TSMF header identified by stream_id = “0x33” and original_network_id = “0x44” in (the TSMF header of) the TSMF packet processed by the TSMF processing unit 212-1 and the TSMF processing unit 212-2. , Header information (for example, extended information) is extracted. Here, two carrier waves including a TSMF header identified by stream_id = “0x33” and original_network_id = “0x44” are a first carrier C1 and a second carrier C2.

Based on the extracted header information (combined information of the two pieces of extended information), the control unit 210 checks the order and the total number of the carrier waves. Here, the order of the carrier waves (carrier_sequence) is "1", "2" and there is no overlap or shortage, and the total number of carrier waves (number_of_carriers) is "2" for all two waves, all of which are the same. Since the values match the total number and can be combined, the control unit 210 determines that the transmission stream (TS) corresponding to the two waves (carriers C1 and C2) is the stream to be combined, and the determination result Is supplied to the selector 216.

{Circle around (4)} The control unit 210 checks the stream type specified in the extracted header information (two-wave extended information). Here, since stream_type = “TS” is specified for all two waves, the control unit 210 determines that the transmission stream (TS) corresponding to the two waves (carriers C1 and C2) is a stream not subject to TLV conversion. The determination is performed, and a control signal corresponding to the determination result is supplied to the selector 215.

The combining unit 213 combines the transmission streams (TS) input from the TSMF processing unit 212-1 and the TSMF processing unit 212-2, and outputs a combined stream (TS stream) obtained as a result.

The selector 215 selects a non-TLV conversion target stream (TS stream) input from the synthesizing unit 213 based on the control signal from the control unit 210, and supplies the stream to the selector 216. The selector 216 selects a non-TLV conversion target stream (TS stream) input from the selector 215 based on a control signal from the control unit 210, and outputs the stream to the system-on-chip 203 as an output stream.

As described above, when the method of Table Hb is adopted, the demodulation IC 202-1 identifies the set identification among the two types of transmission streams (TLV / TS) transmitted by the two carriers C1 and C2. A transmission stream (TS) including (a TSMF header of) a TSMF packet identified by the information (stream_id = “0x33”, original_network_id = “0x44”) is selected as a stream to be combined, and the TSMF header further includes extension information. (Stream type: “TS”), it is also selected as a non-TLV conversion target stream and output as an output stream.

(Processing flow of sender and receiver)
Next, the flow of processing on the transmission side and processing on the reception side will be described with reference to the flowcharts in FIGS.

FIG. 31 is a flowchart illustrating the flow of processing on the transmission side and the reception side.

In FIG. 31, the processes of steps S111 to S113 are executed by the transmitting device 10 such as a head end, and the processes of steps S211 to S213 are performed by a receiving device such as a television set installed at a cable television subscriber's home. 20.

The transmitting device 10 processes contents such as terrestrial broadcasting and satellite broadcasting programs and programs independently produced by a cable television station (S111), and divides the contents for each carrier if necessary, for example, 64QAM or 256QAM. (S112), and transmitted as a cable television broadcast signal (S113).

放送 The broadcast signal is a signal corresponding to a stream such as a single TS, a plurality of TSs, or a transport stream of a multi-carrier transmission system. The broadcast signal transmitted from the transmitting device 10 is received by the receiving device 20 via the CATV transmission path 30.

In step S211, the tuners 201-1 to 201-4 receive the broadcast signal transmitted from the transmission device 10. The demodulation ICs 202-2 to 202-4 perform demodulation processing on the received signals received by the tuners 201-2 to 201-4 and supply the signals to the demodulation ICs 202-1.

In step S212, the demodulation IC 202-1 performs a demodulation process on the signal received from the tuner 201-1 and a synthesis process on the transmission stream obtained by the demodulation process and the transmission streams from the demodulation ICs 202-2 to 202-4. The details of the demodulation / synthesis processing will be described later with reference to the flowchart in FIG.

In step S213, the system-on-chip 203 performs processing such as decoding on the output stream from the demodulation IC 202-1. Thereby, in the receiving device 20, the video of the content such as the program is displayed on the display 204, and the audio synchronized with the video is output from the speaker.

The above has described the flow of processing on the transmission side and the reception side.

(Flow of new function stream output setting process)
Next, the flow of the stream output setting process corresponding to the new function will be described with reference to the flowchart in FIG.

In step S221, the control unit 210 or a control device (for example, a microcontroller or a processor) including an external control unit sends the demodulation IC 202-1 to the demodulation IC 202-1 based on an instruction from a user (a so-called set maker user), for example. Set stream_id and original_network_id. Here, for example, stream_id and original_network_id are set as identification information for the control unit 210 and the TSMF processing units 212-1 to 212-4.

In step S222, the control unit including the control unit 210 or the external control unit sets the demodulation IC 202-1 to the ON state as a stream output.

The stream output setting process of this new function is performed, for example, before the process of step S212 (demodulation / synthesis process) is started, and the process ends when the process of step S222 ends.

The flow of the stream output setting process corresponding to the new function has been described above.

(Flow of demodulation and synthesis processing)
Next, the flow of the demodulation / synthesis processing corresponding to the processing in step S212 in FIG. 31 will be described with reference to the flowchart in FIG. This demodulation / synthesis processing is executed by the demodulation IC 202-1.

In step S231, the demodulation unit 211 performs a demodulation process on a signal received from the tuner 201-1.

In step S232, the TSMF processing units 212-1 to 212-4 perform TSMF processing on the transmission stream input thereto.

For example, here, TSMF processing is performed on each transmission stream based on the identification information (stream_id, original_network_id) set in the processing of step S221 in FIG. 32, and the identification information (stream_id, original_network_id) is included in the header information of the TSMF header. Attempt to detect a TSMF packet specified by (). Then, a TSMF notification indicating whether or not a TSMF packet (TSMF header) is detected, and if the TSMF header includes extended information as header information, the extended information (header information) is sent to the control unit 210.

In step S233, based on the information from the TSMF processing units 212-1 to 212-4, the control unit 210 checks the presence / absence of a TSMF header, and if there is a TSMF header, confirms extended information of the header information.

In step S234, the control unit 210 determines whether or not a TSMF header is included based on the result of the check in step S233.

If it is determined in step S234 that the TSMF header is not included, the process proceeds to step S235. In step S235, the control unit 210 controls the selector 216 so that the transmission stream (single TS) as the non-combination stream input from the demodulation unit 211 is output as an output stream. Note that this processing flow corresponds to the method of Table A (FIGS. 13 and 14).

If it is determined in step S234 that a TSMF header is included, the process proceeds to step S236. In step S236, the control unit 210 determines whether or not the header information of the TSMF header includes extension information based on the result of the check in step S233.

If it is determined in step S236 that the extension information is not included in the header information of the TSMF header, the process proceeds to step S237. In step S237, the control unit 210 controls the selector 216 to output the transmission stream (for example, the stream of the program A) which is the non-synthesis target stream input from the TSMF processing unit 212-1 and is a plurality of TSs. Make it output as a stream. This processing flow corresponds to the method of Table B (FIGS. 15 and 16).

場合 If it is determined in step S236 that the header information of the TSMF header includes extended information, the process proceeds to step S238. In step S238, the combining unit 213 performs a combining process on the transmission stream input from at least one of the TSMF processing units 212-1 to 212-4.

In step S239, the control unit 210 determines whether the stream type included in the extension information is “TLV” or “TS”.

場合 If it is determined in step S239 that the stream type included in the extension information is “TLV”, the process proceeds to step S240.

In step S240, the TLV conversion unit 214 processes the divided TLV stream input from the combining unit 213, and converts the divided TLV packets into TLV packets.

In step S241, the control unit 210 controls the selector 215 and the selector 216 so that the TLV conversion target stream (TLV stream) as the synthesis target stream is output as an output stream. The flow of this processing includes the method of table Ca (FIGS. 17 and 18), the method of table Da (FIGS. 19 and 20), the method of table Fa (FIGS. 23 and 24), And Table Ga (FIGS. 27 and 28).

If the stream type included in the extension information is determined to be “TS” in step S239, the process proceeds to step S242.

In step S242, the control unit 210 controls the

selectors

215 and 216 so that the non-TLV conversion target stream (TS stream) as the stream to be combined is output as an output stream. Note that this processing flow corresponds to the method of the table Eb (FIGS. 21 and 22) and the method of the table Hb (FIGS. 29 and 30).

When the processes of steps S235, S237, S241, and S242 are completed, the process returns to step S212 in FIG. 31, and the subsequent processes are executed.

Although not shown in the demodulation / synthesis process shown in FIG. 33, when the extension information is included in the header information of the TSMF header, the combination information (carrier_sequence, number_of_carriers) of the extension information is checked, and the The synthesis process (S238) can be performed only when the total number and the order of the are consistent. For example, the processing flow when the total number and the order of the carrier waves are inconsistent corresponds to the method of the table Fc (FIGS. 25 and 26).

The demodulation / synthesis processing flow has been described above. By executing the processing shown in the flowcharts of FIGS. 31 to 33 described above, the receiving device 20 having the new function (FIG. 10) can easily output a desired stream.

That is, in the receiving apparatus 20 having the new function (FIG. 10), as shown in the table shown in FIG. 11, a transport stream conforming to the single TS multiplexing scheme, a transport stream conforming to the multiple TS multiplexing scheme, Furthermore, it is necessary to process and output various types of streams such as a transport stream conforming to the multi-carrier transmission scheme. On the other hand, in the new function to which the present technology is applied, the demodulation IC 202-1 (the control unit 210) outputs the TSMF header included in the transmission stream or outputs the TSMF header based on the header information (extended information) of the TSMF header. Since control for selecting a stream is performed, a desired stream can be output more easily.

In the new function to which the present technology is applied, since the identification information (stream_id, original_network_id) is set in (the control unit 210 of the demodulation IC 202-1 and the TSMF processing units 212-1 to 212-4), the TSMF processing unit At 212-1 to 212-4, processing related to the TSMF header is performed based on the set identification information. At control section 210, the set identification information and the TSMF from TSMF processing sections 212-1 to 212-4 are sent. Control for selecting an output stream is performed based on information related to header information of the header.

As a result, as shown in the stream output setting process corresponding to the new function (FIG. 32), software for receiving each program is implemented with fewer processing steps (by software processing). After that, the time until the video is displayed can be reduced. More specifically, when the stream output setting processing corresponding to the new function (FIG. 32) is compared with the stream output setting processing corresponding to the current function (FIGS. 8 and 9), the processing steps are greatly reduced. It is clear that the processing time can be shortened.

Further, for example, in the case of the stream output setting process corresponding to the new function (FIG. 32), the process of holding the TSMF packet in the memory like the stream output setting process corresponding to the current function (FIGS. 8 and 9) (FIG. 32). Since S15 in FIG. 8 and S36 in FIG. 9 are unnecessary, the memory as the receiving system 200 can be reduced. As a result, concerns about cost and processing speed in the receiving system 200 can be resolved.

<2. Modification>

(Other configuration of receiving device)
In the above description, the receiving device 20 (FIG. 1) is described as being configured as a fixed receiver such as a television receiver or a set-top box (STB). , A game machine, a personal computer, a network storage, and the like. Further, the receiving device 20 is not limited to a fixed receiver. For example, a mobile receiver such as a smartphone, a mobile phone, or a tablet computer, a vehicle-mounted device such as a vehicle-mounted television, or a head-mounted display (HMD: Head) An electronic device such as a wearable computer such as a mounted display may be included.

(4) The demodulation IC 202-1 (demodulation device) included in the reception device 20 (FIG. 1) may be regarded as a reception device or a demodulation device to which the present technology is applied. In the above description, the number of the plurality of carriers is 2 to 4, but the number of the carriers is not limited as long as the number is 2 or more (for example, may be 5 or more).

At this time, in the receiving device 20 (FIG. 10), tuners 201-1 to 201-N and demodulation ICs 202-1 to 202-N are provided according to the number of N carrier waves (N is an integer of 2 or more). . In the demodulation IC 202-1 (FIG. 10), one demodulation unit 211 and N TSMF processing units 212-1 to 212-N are provided. Note that the number of tuners 201, demodulation ICs 202, and TSMF processing units 212 is not limited to the same number as the number of carriers, but may be larger than the number of carriers.

(Configuration including communication line)
Also, in the transmission system 1 (FIG. 1), although not shown, the receiving device 20 (FIG. 1) having a communication function is configured such that various servers are connected to a communication line such as the Internet. Various data such as contents and applications may be received by accessing various servers and performing bidirectional communication via a communication line such as the Internet.

(Other)
Note that the terms described in this specification are merely examples, and do not intentionally exclude the use of other terms. For example, in the above description, a frame may be replaced with another term such as a packet.

<3. Computer Configuration>

The series of processes described above can be executed by hardware or can be executed by software. When a series of processing is executed by software, a program constituting the software is installed in a computer. FIG. 34 is a diagram illustrating a configuration example of hardware of a computer that executes the series of processes described above by a program.

In the computer 1000, a CPU (Central Processing Unit) 1001, a ROM (Read Only Memory) 1002, and a RAM (Random Access Memory) 1003 are mutually connected by a bus 1004. An input / output interface 1005 is further connected to the bus 1004. An input unit 1006, an output unit 1007, a recording unit 1008, a communication unit 1009, and a drive 1010 are connected to the input / output interface 1005.

The input unit 1006 includes a keyboard, a mouse, a microphone, and the like. The output unit 1007 includes a display, a speaker, and the like. The recording unit 1008 includes a hard disk, a nonvolatile memory, and the like. The communication unit 1009 includes a network interface and the like. The drive 1010 drives a removable recording medium 1011 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.

In the computer 1000 configured as described above, the CPU 1001 loads the program recorded in the ROM 1002 or the recording unit 1008 into the RAM 1003 via the input / output interface 1005 and the bus 1004, and executes the program. A series of processing is performed.

The program executed by the computer 1000 (CPU 1001) can be provided by being recorded on a removable recording medium 1011 as a package medium or the like, for example. The program can be provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.

In the computer 1000, the program can be installed in the recording unit 1008 via the input / output interface 1005 by attaching the removable recording medium 1011 to the drive 1010. Further, the program can be received by the communication unit 1009 via a wired or wireless transmission medium and installed in the recording unit 1008. In addition, the program can be installed in the ROM 1002 or the recording unit 1008 in advance.

Here, in this specification, the processing performed by the computer according to the program does not necessarily have to be performed in chronological order according to the order described in the flowchart. That is, the processing performed by the computer according to the program includes processing executed in parallel or individually (for example, parallel processing or processing by an object). Further, the program may be processed by one computer (processor) or may be processed in a distributed manner by a plurality of computers.

The embodiments of the present technology are not limited to the above-described embodiments, and various changes can be made without departing from the gist of the present technology.

本 In addition, the present technology can have the following configurations.

(1)
Control for selecting an output stream to be extracted from the transmission stream based on the presence or absence of a multiplex frame header included in the transmission stream transmitted for each of one or more carrier waves, or based on header information of the multiplex frame header. A receiving device including a control unit that performs the control.
(2)
The receiving device according to (1), wherein the control unit selects the output stream based on extension information included in the header information of the multiplexed frame header identified by the set identification information.
(3)
The control unit according to (2), wherein when the transmission stream includes the multiplexed frame header and the header information includes the extension information, the control unit selects a stream to be combined as the output stream. apparatus.
(4)
When the transmission stream does not include the multiplexed frame header, or includes the multiplexed frame header, and does not include the extended information in the header information, as the output stream, the non-composite stream The receiving device according to (2) or (3).
(5)
The extended information includes composite information of the carrier,
The receiving device according to (3) or (4), wherein the control unit selects the synthesis target stream or the synthesis non-target stream as the output stream based on the synthesis information.
(6)
The receiving device according to (5), wherein the combined information includes at least information indicating a total number and an order of the carrier waves.
(7)
The receiving device according to (6), wherein the control unit selects the synthesis target stream as the output stream when the total number and order of the carrier waves are matched.
(8)
The receiving device according to (6) or (7), wherein when the total number and the order of the carrier waves are not matched, the control unit selects the non-combination stream as the output stream.
(9)
The extended information includes type information indicating the type of the transmission stream,
The receiving device according to any one of (3) to (8), wherein the control unit selects a conversion target stream or a conversion non-target stream as the output stream based on the type information.
(10)
The receiving device according to (9), wherein the synthesis target stream includes the conversion target stream or the non-conversion target stream.
(11)
The receiving device according to (9) or (10), wherein the type information includes information indicating a variable length packet or a fixed length packet.
(12)
The receiving device according to (11), wherein when the type of the transmission stream indicates the variable length packet, the control unit selects the conversion target stream for converting the divided variable length packet into a variable length packet.
(13)
The receiving device according to (11) or (12), wherein the control unit selects the non-converted stream when the type of the transmission stream indicates the fixed-length packet.
(14)
The transmission stream includes a transport stream conforming to a single TS multiplexing scheme, a transport stream conforming to a multiple TS multiplexing scheme, or a transport stream conforming to a multi-carrier transmission scheme. The receiving device according to any one of 13).
(15)
Further comprising a plurality of processing units provided according to the number of the carrier wave,
The identification information is set in the control unit and the processing unit,
The processing unit performs a process related to the multiplexed frame header based on the set identification information,
The receiving device according to (2), wherein the control unit selects the output stream based on the set identification information and the header information from the processing unit.
(16)
The receiving device according to (15), wherein the identification information includes a stream identifier and a network identifier.
(17)
A synthesizing unit for synthesizing the stream to be synthesized,
The receiving device according to (15) or (16), further comprising: a conversion unit configured to convert the conversion target stream.
(18)
The receiving device according to any one of (1) to (17), configured as a demodulation device.
(19)
When the number of the carrier waves is N (N is an integer of 2 or more),
The control unit;
A demodulation unit for demodulating a signal of one carrier;
N processing units;
A synthesizing unit for synthesizing the stream to be synthesized,
A first demodulation device having a conversion unit for converting a conversion target stream;
A second demodulating device for demodulating a signal of one carrier wave,
The first demodulation device is provided one,
N-1 second demodulation devices are provided,
The (15) or (16) according to (15) or (16), wherein the N processing units respectively perform processing on the transmission stream from the demodulation unit and processing on the transmission stream from the N-1 second demodulation devices. Receiver.
(20)
The receiving device is
Control for selecting an output stream to be extracted from the transmission stream based on the presence or absence of a multiplex frame header included in the transmission stream transmitted for each of one or more carrier waves, or based on the header information of the multiplex frame header. Do the receiving method.

1. Transmission system, {10} transmission device, {20} reception device, {30} CATV transmission line, {201, 201-1 to 201-4} tuner, {202, 202-1 to 202-4} demodulation IC, {203} system on chip (SoC), {210} control Section, {211} demodulation section, {212, 212-1 to 212-4} TSMF processing section, {213} synthesis section, {214} TLV conversion section, {215} selector, {216} selector, {1000} computer, {1001} CPU

Claims

Control for selecting an output stream to be extracted from the transmission stream based on the presence or absence of a multiplex frame header included in the transmission stream transmitted for each of one or more carrier waves, or based on header information of the multiplex frame header. A receiving device including a control unit that performs the control.
The receiving device according to claim 1, wherein the control unit selects the output stream based on extension information included in the header information of the multiplexed frame header identified by the set identification information.
The receiving device according to claim 2, wherein the control unit selects a synthesis target stream as the output stream when the transmission stream includes the multiplexed frame header and the header information includes the extension information. .
When the transmission stream does not include the multiplexed frame header, or includes the multiplexed frame header, and does not include the extended information in the header information, as the output stream, the non-composite stream The receiving device according to claim 2.
The extended information includes composite information of the carrier,
The receiving device according to claim 3, wherein the control unit selects the synthesis target stream or the non-synthesis target stream as the output stream based on the synthesis information.
The receiving device according to claim 5, wherein the combined information includes at least information indicating a total number and an order of the carrier waves.
The receiving device according to claim 6, wherein the control unit selects the synthesis target stream as the output stream when the total number and the order of the carrier waves are matched.
The receiving device according to claim 6, wherein the control unit selects the non-combination stream as the output stream when the total number and the order of the carrier waves are not matched.
The extended information includes type information indicating the type of the transmission stream,
The receiving device according to claim 3, wherein the control unit selects a conversion target stream or a conversion non-target stream as the output stream based on the type information.
The receiving device according to claim 9, wherein the synthesis target stream includes the conversion target stream or the non-conversion target stream.
The receiving device according to claim 9, wherein the type information includes information indicating a variable length packet or a fixed length packet.
The receiving device according to claim 11, wherein, when the type of the transmission stream indicates the variable-length packet, the control unit selects the conversion target stream for converting the divided variable-length packet into a variable-length packet.
The receiving device according to claim 11, wherein the control unit selects the non-conversion-target stream when the type of the transmission stream indicates the fixed-length packet.
The reception according to claim 1, wherein the transmission stream includes a transport stream conforming to a single TS multiplexing scheme, a transport stream conforming to a multiple TS multiplexing scheme, or a transport stream conforming to a multi-carrier transmission scheme. apparatus.
Further comprising a plurality of processing units provided according to the number of the carrier wave,
The identification information is set in the control unit and the processing unit,
The processing unit performs a process related to the multiplexed frame header based on the set identification information,
The receiving device according to claim 2, wherein the control unit selects the output stream based on the set identification information and the header information from the processing unit.
The receiving device according to claim 15, wherein the identification information includes a stream identifier and a network identifier.
A synthesizing unit for synthesizing the stream to be synthesized,
The receiving device according to claim 15, further comprising: a conversion unit configured to convert the conversion target stream.
The receiving device according to claim 1, wherein the receiving device is configured as a demodulation device.
When the number of the carrier waves is N (N is an integer of 2 or more),
The control unit;
A demodulation unit for demodulating a signal of one carrier;
N processing units;
A synthesizing unit for synthesizing the stream to be synthesized,
A first demodulation device having a conversion unit for converting a stream to be converted;
A second demodulating device for demodulating a signal of one carrier wave,
The first demodulation device is provided one,
N-1 second demodulation devices are provided,
16. The receiving device according to claim 15, wherein the N number of the processing units perform processes on the transmission stream from the demodulation unit and the transmission streams from the N-1 second demodulation devices, respectively.
The receiving device is
Control for selecting an output stream to be extracted from the transmission stream based on the presence or absence of a multiplex frame header included in the transmission stream transmitted for each of one or more carrier waves, or based on header information of the multiplex frame header. Do the receiving method.