JP2003283447A - Data broadcast signal transmission apparatus and data broadcast signal transmission method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a data broadcast signal transmission apparatus capable of efficiently transmitting the data signals of a plurality of kinds. <P>SOLUTION: Parts of a plurality of processing processes subjected to parallel processing by a CPU 153 are respectively set to a PSI/SI data reception section P2 and a PSI/SI data primary multiplex section P3 for converting PSI/SI data into a TS packet, a plurality of remaining processing processes are respectively set to a carousel data reception section P5 and a carousel data primary multiplex section P6 for converting carousel data into a TS packet, and to a PES data reception section P7 and a PES data primary multiplex section P8 for converting PES data into a TS packet. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data broadcasting signal transmitting apparatus and a data broadcasting signal transmitting method for performing data broadcasting in a digital broadcasting system such as satellite broadcasting and terrestrial broadcasting.

[0002]

2. Description of the Related Art With the establishment of digital broadcasting technology in recent years,
Digital broadcasting has started in satellite broadcasting systems that use communication satellites and broadcasting satellites, and there is a plan to shift to digital broadcasting in terrestrial broadcasting systems.

In the above digital broadcasting, not only television broadcasting by image and sound but also broadcasting by character and data (data broadcasting) is possible.

[0004]

By the way, in the above-mentioned data broadcasting, information linked to a television broadcasting program, information independent of the television broadcasting program, and the like are provided. In particular, regarding information linked to a television broadcast program, a plurality of program data (carousel data) is repeatedly transmitted at regular time intervals so that the user can immediately display the information regardless of the start of reception. Therefore, in the broadcasting station, in addition to a transmission system that handles images and audio, a transmission system that handles carousel data and a transmission system that handles information (PES data) independent of a television broadcast program exist separately. Becomes

In particular, in the above broadcasting station, when broadcasting a data broadcasting program for multiple channels, a transmitting device for the transmission system to be added is required, an installation space is required for that amount, and the system cost is increased. It will invite up.

Further, in the above broadcasting station, since the broadcasting band is fixed in advance, the data to be transmitted by the data broadcasting is output at a rate obtained by subtracting the bit rate of the image and audio of the television broadcasting program from the multiplexed output rate. Must. Therefore, it is necessary to manage the bit rate of data broadcasting.

However, the above-mentioned multiplexing device of the broadcasting station can manage the multiplexed output rate of the image and sound of the television broadcast, the carousel data and the PES data of the data broadcast, and is included in the multiplexed output rate. It is difficult to manage the bit rate of data broadcasting.

It is an object of the present invention to efficiently transmit a plurality of types of data broadcasting signals, save space and reduce costs, and manage the total bit rate of a plurality of types of data broadcasting signals. A data broadcasting signal transmitting apparatus and a data broadcasting signal transmitting method capable of

[0009]

In order to achieve the above object, the present invention is configured as follows.

(1) First data broadcast program information obtained by repeatedly arranging material data of each of a plurality of first data broadcast programs at a predetermined cycle, and a second data broadcast program different from the first data broadcast program. And a standardized second data broadcast program information including at least a header area and an information area, and control information related to the first and second service programs to be reproduced on the receiver side, respectively, in a transmission stream having a packet structure. Connected to an input terminal of a multiplexer of a broadcast signal transmission system for converting each transmission stream into another stream by a multiplexer and broadcasting through a predetermined band in a broadcast band, and A data broadcast transmission device capable of parallel processing, comprising a plurality of processes for converting first data broadcast program information into the transmission stream. A first processing process, a second processing process for converting the second data broadcast program information into a transmission stream, and a third processing process for converting control information into a transmission stream, and First
Input data separation means for deriving the data broadcast program information to the first processing process, the second data broadcast program information to the second processing process, and the control information to the third processing process,
Multiplexing output means for multiplexing the respective outputs of the first, second and third processing processes and outputting them to a multiplexer is provided.

According to the invention of (1), one of the plurality of processes is set as a first processing process for converting the first data broadcast program information into a transmission stream, and the remaining plurality of processes are set. Are respectively set as a second processing process for converting the second data broadcast program information into a transmission stream and a third processing process for converting control information into a transmission stream, and the input signal is separated by the input signal separating means. Since the first, second, and third processing processes are sorted by type and the output transmission stream packet of each processing process is multiplexed and output by the multiplex output means, one sending device is the first. It can be shared for the transmission processing of the data broadcasting program and the transmission processing of the second data broadcasting program, and it is not necessary to separately prepare each transmission device. Therefore, it is possible to efficiently transmit a plurality of types of data broadcasting signals with one transmitting device, and further, the number of transmitting devices can be reduced, resulting in cost reduction and space saving, and total bit rate management. You can

(2) The first processing process takes in and analyzes carousel data, and based on the analysis result, TS
A packet is generated and STC (S
ystem Time Clock) is added to the TS packet, and the second processing process takes in and analyzes the PES data, generates a TS packet based on the analysis result, and adds STC as time information to the TS packet, The third process is to capture and analyze PSI / SI data,
A TS packet is generated based on the analysis result, and STC as time information is added to the TS packet,
The multiplexing output means compares the bit rate at the time of multiplexing each output TS packet with a predetermined reference bit rate, and sends the TS packet based on the comparison result.
It is characterized in that multiple outputs are selectively output in the C order.

According to the invention of (2), the bit rate at the time of multiplexing each TS packet is compared with the reference bit rate by the multiplexing output means, and based on the comparison result,
TS packets are selected in order from the earliest STC and are multiplexed and output. Therefore, even if the bit rate exceeds the reference bit rate, it is possible to deal with this relatively flexibly, and by effectively using the limited band for data broadcasting in the broadcasting band, a plurality of types of Data broadcasting signals can be efficiently broadcast.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an intra-station system to which the digital broadcast signal multiplex transmitting apparatus according to the present invention is applied.

This system includes encoders (ENC) 11 and 12 and a multiplexer (MU) as shown in FIG.
X) 13, an encoding / multiplexing control unit (EMC) 14, a data broadcast transmission unit 15, and an automatic program transmission control unit (APC) 1
6, a local clock 17 and a data server (DS) 18.

The encoder 11 compresses and encodes the video signal of the television broadcast program by the MPEG2 encoding system to generate a bit stream, and outputs it to the multiplexer 13. The encoder 12 compresses and encodes the audio signal of the television broadcast program by the AAC (Advanced Audio Coding) encoding method to generate a bit stream, and outputs the bit stream to the multiplexer 13.

The multiplexer 13 includes each encoder 1
The outputs of 1 and 12 and the data for data broadcast output from the data broadcast transmitter 15 are multiplexed and transmitted as a transport stream.

The encoding / multiplexing control unit 14 controls the encoders 11 and 12 and the multiplexer 13 based on the instruction information provided from the automatic program transmission control unit 16, the broadcast schedule data, and the organization time measured by the local clock 17. .

The data broadcast transmission section 15 includes the instruction information and the data server 18 provided from the automatic program transmission control section 16.
TS of data broadcasting based on the organization information provided by
The packet is sent to the multiplexer 13.

The automatic program transmission control unit 16 sends instruction information to the encoding / multiplexing unit 14 and the data broadcast transmission unit 15 according to the broadcast schedule data provided from the data server 18 and the program organization time measured by the local clock 17. The data is transmitted to control the encoding / multiplexing process of the encoding / multiplexing unit 14, and the transmission process of the data broadcast transmitting unit 15 is controlled.

FIG. 2 is a block diagram showing a specific configuration of the data broadcast transmission section 15.

In FIG. 2, an input interface (I / F) 152, a CPU 153, and an R are provided on the data bus 151.
The AM 154 and the output buffer 155 are connected. Also,
The ROM 156 is connected to the CPU 153. Also,
The output interface (I / I
F) 157 is connected.

The CPU 153 is, for example, a multi-task operation system processor that processes a plurality of processing processes in parallel, and executes software processing as shown in FIG. 3 based on a control program stored in the ROM 156.

That is, in the control program stored in the ROM 156, the application interface (I / F) processing unit P1 and PSI /
SI data receiving section P2, PSI / SI data primary multiplexing section P3, secondary multiplexing processing section P4, carousel data receiving section P5, carousel data primary multiplexing section P6, PE
There is an S data receiving section P7 and a PES data primary multiplexing section P8. These operate independently of each other under the control of the CPU 153.

In the CPU 153, in the application interface processing section P1, the data server 18
PSI / SI data, carousel data, P as control information related to the data broadcast program to be reproduced on the receiver side based on the organization information provided by
Identifies ES data and identifies identified PSI / SI data as P
The carousel data is distributed to the SI / SI data receiving unit P2, the carousel data receiving unit P5, and the PES data is distributed to the PES data receiving unit P7.

The PSI / SI data receiving section P2 stores the received PSI / SI data in an appropriate area of the RAM 154. In the PSI / SI data primary multiplexing unit P3,
The PSI / SI data receiving section P2 converts the PSI / SI data stored in the RAM 154 into a TS packet, sets the transmission order of the TS packet, and transmits the ST
C is added, and then the TS packet is stored in the output buffer 155.

The carousel data receiving section P5 stores the received carousel data in an appropriate area of the RAM 154. The carousel data primary multiplexing unit P6 converts the carousel data stored in the RAM 154 by the carousel data receiving unit P5 into TS packets, and
The transmission order is added to this TS packet and the transmission STC is added, and then the TS packet is output to the output buffer 155.
To store.

The PES data receiving section P7 receives the received P
The ES data is stored in an appropriate area of the RAM 154.
The PES data primary multiplexing unit P8 converts the PES data stored in the RAM 154 by the PES data receiving unit P7 into TS packets, sets the sending order to the TS packets, and adds the sending STC.
The S packet is stored in the output buffer 155. At this time, based on the STC value, PTS (Presentation Time St
amp) and DTS (Decorde Time Stamp).

In the quadratic multiplexing processor P4, the output buffer 1
The TS packets stored in 55 are output interface 1 in the order of higher STC values added to the TS packets.
Output via 57.

Thus, from the data broadcast transmission section 15 to the PE
A TS in which S data, carousel data, and PSI / SI data are multiplexed is generated.

In the second-order multiplexing processing section P4, each TS of PES data, carousel data, and PSI / SI data is
When the bit rate when multiplexing packets is compared with the reference rate, and if there is a risk that the bit rate will exceed the reference rate from this comparison result, the STC outputs TS packets from the earliest and the time when they exceed the reference rate. And output T
The S packet is also discarded.

Next, the processing operation of the above configuration will be described. The above PES data and carousel data are
It is data indicating data broadcast programs produced independently of each other. Further, the PSI / SI data is data necessary for controlling the start / stop of the data broadcast program in the receiver.

As shown in FIG. 4A, the PSI / SI data is data to be transmitted at regular intervals, and the carousel data is the same as the number of data broadcast programs to be transmitted, as shown in FIG. 4B. ES data of FIG. 4 is repeatedly arranged at regular intervals, and the PES data is as shown in FIG.
As shown in, the data is data to be transmitted according to the broadcast time.

However, carousel data and PES
Since the data is generated independently of each other, separate transmitting devices are required, and the system configuration in the broadcasting station becomes complicated as the number of channels increases. Therefore, in this embodiment, PSI / SI data, carousel data, and PE
The S data is input as it is to one data broadcast transmission unit 15, and the CPU 153 in the data broadcast transmission unit 15 processes PSI / SI data, carousel data and PES data separately by multitask processing.

Here, in the data broadcast transmission unit 15, PS
The PSI / SI data is read by the I / SI data receiving unit P2.
The data is stored in the AM 154, the carousel data receiving unit P5 stores the carousel data in an area different from the PSI / SI data of the RAM 154, and the PES data receiving unit P7 stores P
The ES data is stored in an area other than the PSI / SI data and the carousel data of the RAM 154.

The PSI / SI data stored in the RAM 154 is transferred to the ST in the PSI / SI data primary multiplexing unit P3.
A C packet, a TS header, an adaptation field and the like are added to generate a TS packet, which is written in the output buffer 155. The carousel data stored in the RAM 154 is stored in the carousel data primary multiplexing unit P6 as
An STC, a TS header, an adaptation field and the like are added to generate a TS packet, and the output buffer 15
Written to 5. Further, the PES data stored in the RAM 154 is stored in the SES in the PES data primary multiplexing unit P8.
TC, TS header, adaptation field, etc. are added to generate a TS packet, and the output buffer 155
Written in.

The STC value of each TS packet written in the output buffer 155 is identified by the secondary multiplexing processing section P4, and transferred to the output interface 157 based on the identification result. With this, PSI / S
A TS for data broadcasting in which I data, carousel data, and PES data are multiplexed is generated.

In the second-order multiplexing processing unit P4, the bit rate to be multiplexed is compared with the reference rate. If the reference rate is exceeded, the TS packet to be transmitted at that point is discarded and the multiplexer is used. Prevent the bankruptcy of 13. Further, when the TS packet is discarded, the fact that it is discarded may be notified to the outside as an alarm.

Therefore, according to the data broadcast transmitting section 15, the PSI / SI data, the carousel data, and the P
Even if ES data is input as it is, PSI / SI data, carousel data, and P
ES data can be efficiently multiplexed and transmitted. Therefore, the multiplexer 13 does not need to manage the bit rate of the TS for data broadcasting, and the processing load of the multiplexer 13 can be reduced accordingly.

As described above, according to the above embodiment, the CP
One of the plurality of processing processes to be processed in parallel by U153 is set in the PSI / SI data primary multiplexing unit P3 for converting PSI / SI data into TS packets, and the remaining plurality of processing processes are respectively set to carousel data. Carousel data primary multiplexing unit P for converting data into TS packets
6. Since the PES data primary multiplexing unit P8 for converting PES data into TS packets is set, one data broadcast transmission unit 15 can be shared for PES data transmission processing and carousel data transmission processing. However, it is not necessary to separately prepare each sending device.

Therefore, in one data broadcasting transmission unit 15, P
The ES data and the carousel data can be efficiently TS-packed and transmitted, and further, cost reduction and space saving can be achieved, and total bit rate management in data broadcasting can be performed.

Further, according to the above-described embodiment, the bit rate at the time of multiplexing each TS packet is compared with the reference bit rate by the quadratic multiplexing processing unit P4, and from the result of this comparison, the multiplexing bit rate becomes the reference rate. If there is a risk of exceeding, TS packets are selected in the order of STC,
Multiple output.

Therefore, even if the multiplexing bit rate exceeds the reference rate, it can be dealt with relatively flexibly, and this effectively uses the limited band for data broadcasting in the broadcasting band. , Multiple types of data broadcast signals can be efficiently broadcast.

The present invention is not limited to the above embodiment. For example, in the above embodiment, MPEG
Although an example of handling a standard data broadcast signal has been described, a data broadcast signal other than MPEG may be handled.

In addition, the configuration of the in-office system, the type and configuration of the data broadcast transmission unit, the data processing control procedure in the data broadcast transmission unit, and the like can be variously modified and implemented without departing from the scope of the present invention.

[0047]

As described above in detail, according to the present invention,
A data broadcast signal transmission device capable of efficiently transmitting a plurality of types of data broadcast signals, saving space and cost, and managing the total bit rate of a plurality of types of data broadcast signals, and A data broadcast signal transmission method can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an in-station system to which a data broadcast signal transmission device according to the present invention is applied.

FIG. 2 is a block diagram showing a hardware configuration of a data broadcast transmitting section shown in FIG.

FIG. 3 is a block diagram showing a software configuration of a data broadcast transmission section shown in FIG.

FIG. 4 is PSI / SI data handled in the above embodiment,
The timing chart of carousel data and PES data.

[Explanation of symbols]

11, 12 ... Encoder (ENC), 13 ... Multiplexer (MUX), 14 ... Encoding multiplex control unit (EMC), 15 ... Data broadcast sending unit, 16 ... Automatic program sending control unit (APC), 17 ... Local clock, 18 ... Data server (DS), P1 ... Application interface (I / F) processing unit, P2 ... PSI / SI data receiving unit, P3 ... PSI / SI data primary multiplexing unit, P4 ... Secondary multiplexing processing unit, P5 ... Carousel Data receiving unit, P6 ... Carousel data primary multiplexing unit, P7 ... PES data receiving unit, P8 ... PES data primary multiplexing unit.

Claims (4)

[Claims] 1. First data broadcasting program information, which is obtained by repeatedly arranging material data of each of a plurality of first data broadcasting programs at a predetermined cycle, and a second data broadcasting program different from the first data broadcasting program. Standardized second data broadcast program information including at least a header area and an information area, and control information related to the first and second service programs to be reproduced on the receiver side for transmission of a packet structure, respectively. Connected to an input terminal of the multiplexer of the broadcast signal transmission system for converting into a stream and multiplexing each transmission stream with other streams by the multiplexer to broadcast through a predetermined band in the broadcast band, and A data broadcast signal transmission device capable of parallel processing of a plurality of processes, wherein the first data broadcast program information is used for the transmission as the plurality of processes. A first processing process for converting to stream, a second processing process for converting the second data broadcast program information into the transmission stream, and a third processing process for converting the control information into the transmission stream. Of the input signals, the first data broadcast program information is sent to the first processing process, the second data broadcast program information is sent to the second processing process, and the control information is sent to the third processing process. And a multiplexing output means for multiplexing the respective outputs of the first, second and third processing processes and outputting the multiplexed outputs to the multiplexing device. Signal transmission device. 2. An MPEG (Moving Picture Experts) composed of a plurality of first data broadcast programs at predetermined intervals.
Group) Carousel data obtained by repeatedly arranging ES (Elementary Stream) data, and a PES composed of a second data broadcast program different from the first data broadcast program.
(Packetized Elementary Stream) data and PSI / SI data relating to the first and second service programs to be reproduced on the receiver side are respectively TS (Tr
ansport stream), and each TS is multiplexed with another TS by a multiplexer and is connected to an input terminal of the multiplexer of a broadcast signal transmission system for broadcasting via a predetermined band in a broadcast band, and A data broadcast signal transmitting device capable of performing parallel processing on a plurality of processes, wherein the first processing process for converting the carousel data into the TS packets is P as the plurality of processes.
A second processing process for converting ES data into the TS packet and a third processing process for converting the PSI / SI data into the TS packet are provided, and the carousel data in the first An input signal separation means for deriving the PES data to a second processing process and the PSI / SI data to a third processing process, and outputs of the first, second and third processing processes. A data broadcasting signal transmitting device, comprising: a multiplexing output means for multiplexing TS packets and outputting them to the multiplexing device. 3. The first processing process captures and analyzes the carousel data, generates a TS packet based on the analysis result, and stores ST as time information.
C (System Time Clock) is added to the TS packet, and the second processing process captures and analyzes the PES data, generates a TS packet based on the analysis result, and also generates STC as time information in the TS packet. The third processing process takes in and analyzes the PSI / SI data, generates a TS packet based on the analysis result, and adds STC as time information to the TS packet, The output means compares the bit rate at the time of multiplexing each output TS packet with a predetermined reference bit rate, and selectively multiplex-outputs the TS packets according to the transmission STC order based on the comparison result. The data broadcasting signal transmission device according to claim 2. 4. First data broadcast program information, which is obtained by repeatedly arranging material data of each of a plurality of first data broadcast programs every predetermined period, and a second data broadcast program different from the first data broadcast program. Standardized second data broadcast program information including at least a header area and an information area, and control information related to the first and second service programs to be reproduced on the receiver side for transmission of a packet structure, respectively. A method used for a data broadcast signal transmitting device which converts a stream, multiplexes and outputs these transmission streams, and is capable of processing a plurality of processes in parallel, wherein the plurality of processes include the first data. A first processing process for converting broadcast program information into the transmission stream, and converting the second data broadcast program information into the transmission stream. Second processing process, and leave a third processing process for converting the control information into the transmission stream, among the input signal, the first data broadcast program information first
The second data broadcasting program information to the second processing process and the control information to the third processing process, and outputs the respective outputs of the first, second and third processing processes. A method for transmitting a data broadcast signal, characterized by multiplexing.