JP2002353916A - Digital broadcasting transmitter, digital broadcasting receiver and digital broadcasting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a broadcasting system for transmitting information which complements a ground wave analog broadcasting program, using the data area of digital broadcasting, and synchronizing the complementary information and ground wave analog broadcasting. SOLUTION: In this digital broadcasting transmitter, information related to an analog broadcasting program is transmitted by digital data broadcasting in a digital broadcasting or analog broadcasting program; and reference information for synchronizing information related thereto are transmitted by digital data broadcasting and the receiver simultaneously receives digital data broadcasting and analog broadcasting, selects the reference information for synchronizing the information related to the analog broadcasting program from among the analog broadcasting program and digital data broadcasting, stores the information on a prescribed medium, prepares and suitably displays the storage medium.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital broadcast transmitting apparatus, a digital broadcast receiver, and a digital broadcast system, and more particularly to a digital broadcast receiver capable of receiving information related to a terrestrial analog broadcast program. Digital broadcasting, which enables users to know information of existing terrestrial analog broadcasting without being limited to digital broadcasting.

[0002]

2. Description of the Related Art In the prior art, BS / CS 110 °
In digital broadcasting using broadcast satellites or communication satellites, digital data broadcasting is carried out for the purpose of transmitting complementary information or independent information of digital television broadcasting being broadcast by its own station.

[0003]

However, the digital data broadcasting described in the prior art is independent of the terrestrial analog broadcasting of its own station and has no relationship with the digital broadcasting. In the data broadcasting band inserted in the vertical synchronization section of terrestrial analog broadcasting, there is a problem that advanced services such as interactive services cannot be realized due to the low transmission rate.

Therefore, even in digital data broadcasting,
There is a problem to be solved in a configuration capable of transmitting the supplementary information for understanding the contents of the existing terrestrial analog broadcast by digital data broadcasting and a configuration capable of receiving the complementary information.

[0005]

In order to solve the above-mentioned problems, a digital broadcast transmitting apparatus, a digital broadcast receiver, and a digital broadcast system according to the present invention have the following configurations.

[0006] (1) A digital broadcast transmitting apparatus characterized in that information related to an analog broadcast program is transmitted to a digital data broadcast.

[0007] (2) A digital broadcast transmitting apparatus for transmitting an analog broadcast program and reference information for synchronizing information related to the analog broadcast program to a digital data broadcast.

(3) Digital broadcasting, wherein digital data broadcasting and analog broadcasting are simultaneously received, and reference information for synchronizing with information related to the analog broadcasting program is selected from the analog broadcasting program and digital data broadcasting. A digital broadcast receiver, wherein the digital broadcast receiver is stored in a predetermined medium to create a storage medium and to display the storage medium as needed. (4) When playing back an analog broadcast program stored in the storage medium, information related to the analog broadcast program is read from the storage medium and displayed on the same screen in synchronization with the analog broadcast program. The digital broadcast receiver according to (3), further comprising control means. (5) There is provided a notifying means for notifying the viewer that there is information linked to the analog broadcast using information or sound effects related to the analog broadcast displayed on the screen. 3) The digital broadcast receiver according to the above.

(6) Transmission means for transmitting information related to an analog broadcast program to a digital data broadcast, and information related to the analog broadcast program included in the digital data broadcast when the digital data broadcast is received. And a receiving means capable of decoding and displaying and selecting as appropriate. (7) The digital broadcasting system according to (6), wherein the transmission means transmits an analog broadcast program and reference information for synchronizing information related to the analog broadcast program to the digital data broadcast. (8) The receiving means simultaneously receives the digital data broadcast and the analog broadcast, selects reference information for synchronizing with information related to the analog broadcast program from the analog broadcast program and the digital data broadcast, and (6) The digital broadcast system according to (6), wherein the digital broadcast system is configured to create a storage medium by storing the information on the medium and appropriately display the storage medium. (9) When playing back the analog broadcast program stored in the storage medium, the receiving means reads information related to the analog broadcast program from the storage medium and synchronizes the information with the analog broadcast program on the same screen. The digital broadcast system according to (8), wherein the digital broadcast system is displayed. (10) The receiving means includes a notifying means for notifying a viewer that there is information linked to the analog broadcast using information or a sound effect related to the analog broadcast displayed on a screen. The digital broadcasting system according to (6), which is characterized in that:

As described above, by transmitting information related to analog broadcasting to digital broadcasting, program information related to terrestrial analog broadcasting can be known even in digital broadcasting. Two-way services can be provided.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of a digital broadcast transmitting apparatus, a digital broadcast receiver and a digital broadcast system according to the present invention will be described with reference to the drawings.

In a digital broadcast using a BS / CS 110 ° broadcast satellite or a communication satellite according to the present invention, a digital broadcast receiver capable of receiving the digital broadcast, as shown in FIG. BS / CS antenna input unit 1 for receiving, BS / CS tuner unit 2 for converting an input broadcast signal into baseband, digital demodulation circuit 3 for demodulating the baseband converted broadcast signal, and error correction circuit 4 A demultiplexer 5 for extracting necessary video and audio signals, a terrestrial antenna input unit 6 for receiving a terrestrial broadcast signal, a terrestrial tuner unit 7 for demodulating the input broadcast signal, and a demodulated signal. A video decoder 8 for converting digital signals, an MPEG encoder 9 for compressing digital signals, a CPU 10,
A modem for communication specifications stipulated in the standard of the S digital broadcast receiver and a wireless module 11 for a mobile phone replacing a wired telephone line, an antenna 12 thereof, a hard disk interface unit 13, a hard disk drive (HDD) 14, It comprises an MPEG decoder 16 and an OSD circuit 17 for driving superimposed display.
Among them, demultiplexer 5, MPEG encoder 9, CPU 10, memory 11, MPEG decoder 16,
The hard disk interface unit 14 is connected to the system bus 18, and its operation is controlled by the CPU 10.

In a digital broadcast receiver using a storage medium prepared using the hard disk drive 15 having such a configuration, a BS / CS broadcast signal input to the BS / CS antenna input unit 1 is transmitted to the BS / CS broadcast signal. The signal is converted into a base band by the CS tuner 2 and input to the digital demodulation circuit 3.

The demodulated signal is subjected to error correction by an error correction circuit 4, and necessary video and audio signals are extracted by a demultiplexer 5 and recorded on a hard disk drive 15 via a system bus 18 and a hard disk interface unit 14. To create storage media.

Similarly, the signal input to the terrestrial antenna input unit 6 is demodulated by the tuner unit 7, digitized by the video decoder 8, compressed by the MPEG encoder 9 in the MPEG-2 system, It is recorded on the hard disk drive 15 via the system bus 18 to create a storage medium.

The data of the broadcast program recorded on the hard disk drive 15 is read out by the user's operation, input to the MPEG decoder 16 via the hard disk interface unit 14 via the system bus 18 and demodulated. , And an audio signal demodulated by the MPEG decoder 16 is also output.

The receiver is provided with a time clock unit 15, and the CPU 10 manages the system using the time generated by the time clock unit 15.

[0018] In the BS / CS data broadcast band, information linked to a terrestrial analog broadcast program is transmitted. At the same time, a program ID for specifying the terrestrial analog broadcast and a reference time for synchronizing with the terrestrial analog broadcast program are transmitted.

BS / C simultaneously with terrestrial analog broadcast programs
If transmission by S data broadcasting is not possible, transmission is performed before or after the time, so that the user can view the broadcast program in conjunction with the data program that is linked when the corresponding broadcast program is stored in the hard disk drive 14.

When receiving a terrestrial analog broadcast, the receiver also receives a BS / CS digital broadcast data program at the same time and checks whether there is a data program linked to the terrestrial analog broadcast program.

When there is a linked data program, information of the program corresponding to the time designated by the data program is displayed.
If there is no linked data program, the data program stored in the hard disk drive 14 is searched in advance,
The information of the data program corresponding to the time specified by the stored data program is displayed.

If neither of them exists, the conventional viewing system is used.

When storing a terrestrial analog broadcast program, the program ID and reference time information transmitted in the BS / CS data broadcast program are written in the header and time stamp of an MPEG-2 stream for storage. This writing makes it possible to link with a data program to be referenced at the time of post-reproduction. In order to enjoy this service, if a viewing contract is required, when viewing the linked data program, authentication is performed on the server via the mobile phone wireless module 11, and if authentication is obtained, the viewing is performed. Becomes possible.

Next, a digital broadcast transmitting apparatus will be described with reference to FIG.

The digital broadcast transmitting apparatus according to the present invention includes a video I / F section 21 for receiving a video signal, a video compression section 22 for compressing a received audio signal, and an audio I / F section for receiving an audio signal.
/ F section 23, an audio compression section 24 for compressing a received audio signal, a data I / F section 25, a multiplexer section 26 for multiplexing, a secondary multiplexer section 27,
It comprises an AS unit 28, an MPEG-TS buffer unit 29, a second data broadcast encoding unit 30B, and a CPU 31. Among them, the video I / F unit 21, the video compression unit 22, the audio I / F unit 23, the audio compression unit 24, and the multiplexer unit 26 form a first encoding unit 30A.

The second encoder 30B for data broadcasting includes a video I / F unit 32 for receiving video, a video compression unit 33 for compressing received video, and an audio I / F unit 3 for receiving audio.
4, an audio compression unit 36 for compressing the received audio signal,
It is composed of a data I / F unit 37 and a multiplexer unit 38, and the output of the multiplexer unit 38 is input to the secondary multiplexer unit 27.

In such a configuration, two first and second encoding units 30A and 30B are provided for multiplexing. The first encoding unit 30A encodes a video signal and an audio signal constituting one stream (one program channel). For this reason, the first encoding unit 30
A supplies the video signal received by the video I / F unit 21 to the video compression unit 22.

The video compression unit 22 converts the input video signal into M
The data is encoded (compressed) by the PEG-2 method and output to the multiplexer unit 26.

On the other hand, the audio I / F unit 23 takes in an audio signal and outputs it to the audio compression unit 24. Audio compression unit 2
Reference numeral 4 encodes (compresses) the input audio signal and outputs it to the multiplexer unit 26. Data I / F unit 25
Captures the data to be multiplexed into the stream, and outputs the data to the multiplexer unit 26.

The second encoder 30B for data broadcasting also performs video signal and audio signal interface, encoding (compression), and data interface multiplexing in the same manner.

The bit rates of the streams multiplexed by the respective multiplexer sections 26 and 38 are determined by the CPU 31
To be notified.

The outputs of the multiplexers 26 and 38 are supplied to the secondary multiplexer 27. The CPU 31 includes first and second encoding units 30A and 30A.
The bit rate of B and the maximum bit rate of the transmission path are compared, and the bit rate at which the first and second encoding units 30A and 30B can be multiplexed is calculated. The stream for data broadcasting is read out according to the bit rate value, and an output instruction is given to the secondary multiplexer unit 27, multiplexed, and cascaded.
Output to the unit 28.

The CAS unit 28 encodes the stream supplied from the secondary multiplexer unit 27 using a predetermined key (a key corresponding to a key stored in the viewer's IC card). The data is scrambled and supplied to the MPEG-TS buffer unit 29. MP
The EG-TS buffer unit 29 outputs the input multiplexed stream as an MPEG transport stream to a transmission device (not shown).

FIG. 3 shows an example of transmitting reference information to be inserted into a data broadcast. An event message transmission system is defined in a data carousel transmission section. One of stream descriptors is as follows. NPT (N
normal Play Time reference descriptor can be transmitted. This NPT reference descriptor includes STC
3 called “System Time Clock”
Reference information consisting of 3 bits can be transmitted.

The counter values counted down from the 27 MHz reference clock generated on the data broadcasting side are individually stored. This counter value converts analog broadcasts to MPE
By diverting and inserting as a time stamp of the G-compressed stream, it is possible to associate an analog broadcast with a data broadcast by specifying a counter value together with an ID capable of specifying a broadcast program.

FIG. 4 and FIG.
FIG. 4 shows a compressed stream, and FIG. 4 shows a case of a transport stream (TS) in which a time stamp is indicated by PCR (P) in conditional coding of an adaptation field of a transport packet.
(Program Clock Reference).

FIG. 5 shows the case of the program stream (PS). The time stamp is the SCR in the pack header.
(System Clock Reference).

FIG. 6 is a flowchart showing a processing procedure when the receiver receives a terrestrial analog broadcast program. The receiver always receives the BS digital data broadcast and transmits the reference time information transmitted in FIG. It receives (step S1).

Since the transmission is performed by the carousel, the reference time information may not be received depending on the timing due to the reception processing. Therefore, it is determined whether the reference time information has been received during the processing (step S2).

If the reference time information can be received in step S2, the in-flight time of the time clock unit 15 (see FIG. 1) generated by the receiver is reset (step S3).

If the reference time information cannot be received in step S2, the in-flight time is advanced by a clock generated by dividing the in-flight time from the real-time clock in the receiver (step S4).

The receiver determines whether or not to start recording based on a user's instruction or execution of a recording reservation. If recording is not started, a series of processes is terminated (step S5).

When recording is started in step S5, the program ID is simultaneously stored in a memory or the like of the receiver (step S6).

Next, when recording is started, if recording is in progress, time information substantially synchronized with reference time information transmitted by data broadcasting is written into a predetermined data area of the MPEG stream to be recorded (step S7). , S8).

If no data is recorded in step S7, the process is terminated.

As described above, the receiver always performs the present process regardless of the presence or absence of the recording, and performs the process of synchronizing the internal time with the reference time information.

FIG. 7 is a flowchart showing a processing procedure when the receiver reproduces a terrestrial analog broadcast program. It is determined whether or not the reproduction has been started. If the reproduction has not been started, this processing is ended. (Step S11).

In step S11, when the reproduction is started, it is determined whether or not the user is a service contractor. When the reproduction is not a contractor, the present process is terminated (step S12).

In step S12, in the case of a contractor, the program ID whose reproduction has been started is read from a memory or the like,
It is determined whether the data is relevant pre-accumulation-related data (steps S13 and S14).

If there is no corresponding pre-accumulation-related data in step S14, the normal reproduction operation is continued,
This processing ends (step S14).

If it is determined in step S14 that the corresponding data exists, the data is transferred to the hard disk drive 14.
(See FIG. 1), the PCR (Pr) in the MPEG stream of the program being reproduced and the time specified in the data.
ogram Clock Reference / SC
R (System Clock Reference)
e) Compare whether the times match (step S1)
5).

In step S16, as a result of the comparison,
If they do not match, the time comparison is repeated (step S
16).

If they match, a data program is started in accordance with the instruction of the corresponding data, or the fact that a related data program is present is displayed to the user to urge the user to perform an operation (step S17). This is based on the information or sound effects related to analog broadcasting, and the operator (viewer)
That there is information linked to analog broadcasting.

FIG. 8 is a flowchart showing the authoring processing procedure on the transmitting side. First, it is determined whether or not there is transmission of related information in analog terrestrial broadcasting. In order to perform post-accumulation transmission, the program ID of the current broadcast program is stored, stored together with the reference time during the broadcast time, and the process ends (steps S21, S22, S23).

In step S21, in the case of transmission,
Specify the corresponding program ID, determine whether it is pre-storage, and if it is post-storage, read the reference time stored in advance, correct the start time of the related information, transmit it, and end this processing (Steps S24, S25, S26, S
27, S28).

In step S25, in the case of pre-storage, reference time information to be transmitted is designated, and related information is transmitted (steps S29 and S30).

Next, it is determined whether or not the broadcast of the corresponding program has been started. If it is before the broadcast, the program stands by until the start (step S31).

If the broadcast is started in step 31, the reference time information to be transmitted in the data broadcast is changed to the designated time and the transmission is started (step S3).
2).

FIG. 9 shows an example of a business model of the present invention.
1. Service provider 4 that provides related information to the broadcaster 42, band usage fee, viewing history for the receiver, etc.
3, a receiver 44, and a receiver maker 45 that provides the receiver 44.

In such a configuration, the viewer 46 purchases the receiver 44 from the receiver manufacturer 45 and pays the purchase price. The viewer 46 concludes a viewing contract for the service with the service provider 43 as desired. The service provider 43 provides the related information to the broadcaster 42, has them transmitted, and pays a transmission band usage fee.

The viewer 46 operates the receiver 44 to view related information. The receiver 44 periodically transmits the viewing history of the viewer 46 to the service provider 43. The service provider 43 makes a billing request to the financial institution 41 designated by the viewer 46 based on the viewing history, and pays a proxy fee.

The financial institution 41 bills the requested bill to the viewer 46, receives the payment, and pays the bill to the service provider 43. Further, the financial institution 41 executes the requested billing to the viewer 46, receives the payment, and pays the billing amount to the service provider 43. The service provider 43 pays a viewing incentive to the receiver manufacturer 45 in accordance with the service viewing of the viewer 46.

In this way, the viewer 46 who has purchased the receiver 44 can view a desired broadcast by signing a viewing contract with the service provider 43, and the billing / payment can be made through the specialized financial institution 41. It can be carried out.

[0064]

As described above, by transmitting additional information for a terrestrial analog broadcast program using a different band, advanced bidirectional communication can be performed using the function built into the BS / CS digital broadcast receiver. There is an effect that the service can be realized.

In addition, the fact that it is impossible to realize the real-time viewing of a terrestrial analog broadcast program is temporarily stored in the hard disk drive, so that a new service is provided to the viewer. This has the effect of creating a new form of viewing system.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram schematically showing the configuration of a digital broadcast receiver according to the present invention.

FIG. 2 is an explanatory diagram schematically showing a configuration of a digital broadcast transmitting apparatus according to the present invention.

FIG. 3 is a data structure of a reference time multiplexed on the data program.

FIG. 4 shows a reference time MPEG extracted from the data program.
FIG. 3 is an explanatory diagram showing an example of writing a time stamp in a transport stream.

FIG. 5 shows a reference time MPEG extracted from the data program.
3 is an explanatory diagram showing an example of writing a time stamp in a program stream. FIG.

FIG. 6 is a flowchart showing a process when the terrestrial analog broadcast program is received in real time.

FIG. 7 is a flowchart showing processing when the stored terrestrial analog broadcast program is reproduced.

FIG. 8 is a flowchart showing an authoring processing procedure on the sending side.

FIG. 9 is an explanatory diagram schematically showing an example of the business model.

[Explanation of symbols]

1: BS / CS antenna input unit, 2: BS / CS tuner unit, 3: digital demodulation circuit, 4: error correction circuit,
5; demultiplexer; 6; terrestrial antenna input unit;
7; terrestrial tuner section; 8; video decoder; 9; M
PEG encoder, 10; CPU, 11; wireless module for mobile phone, 12; antenna, 13; hard disk interface, 14; hard disk drive (HDD), 15; time clock, 16;
EG decoder, 17; OSD circuit, 18; system bus, 21; video I / F, 22; video compression, 23;
/ F, 24; audio compression, 25; data I / F, 26; multiplexer, 27; secondary multiplexer, 2
8; CAS, 29; MPEG-TS buffer, 30; C
PU, 31; data transmission unit, 32; video I / F, 33;
Video compression, 34; audio I / F, 35; data I / F, 3
6; Multiplexer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) H04N 7/03 7/035 F term (reference) 5C025 AA01 AA30 BA25 BA27 BA28 BA30 CA02 CA09 CA18 CA20 CB07 CB10 DA01 DA04 DA05 5C063 AA01 AB03 AB07 AC01 AC10 CA23 CA29 CA36 DA03 DA07 DA13 EB46 EB50 5K061 BB06 BB10 DD02 DD14 FF04 FF11 JJ06 JJ07

Claims (10)

[Claims] 1. A digital broadcast transmitting apparatus for digital broadcasting, wherein information relating to an analog broadcast program is transmitted to a digital data broadcast. 2. A digital broadcast transmitting apparatus for digital broadcasting, wherein an analog broadcast program and reference information for synchronizing information related thereto are transmitted to the digital data broadcast. 3. A digital broadcast, wherein a digital data broadcast and an analog broadcast are simultaneously received, and reference information for synchronizing with information related to the analog broadcast program is selected from the analog broadcast program and the digital data broadcast. A digital broadcast receiver characterized in that a storage medium is created by storing it in a predetermined medium and can be appropriately displayed. 4. When reproducing an analog broadcast program stored in the storage medium, information related to the analog broadcast program is read out from the storage medium and displayed on the same screen in synchronization with the analog broadcast program. 4. The digital broadcast receiver according to claim 3, further comprising analog broadcast control means. 5. A notifying means for notifying a viewer that there is information linked to the analog broadcast using information or a sound effect related to the analog broadcast displayed on the screen. The digital broadcast receiver according to claim 3. 6. A transmitting means for transmitting information related to an analog broadcast program to a digital data broadcast, and transmitting information related to the analog broadcast program included in the digital data broadcast when the digital data broadcast is received. A digital broadcasting system comprising a receiving means capable of decoding and displaying and selecting as appropriate. 7. The digital broadcast system according to claim 6, wherein said transmitting means transmits an analog broadcast program and reference information for synchronizing information related to the analog broadcast program to said digital data broadcast. . 8. The receiving means receives the digital data broadcast and the analog broadcast at the same time, selects reference information for synchronizing with information related to the analog broadcast program from the analog broadcast program and the digital data broadcast, and 7. The digital broadcasting system according to claim 6, wherein the storage medium is stored in a predetermined medium to create a storage medium and display the storage medium as needed. 9. When the analog broadcast program stored in the storage medium is reproduced, the receiving means reads out information related to the analog broadcast program from the storage medium and synchronizes the information with the analog broadcast program. 9. The digital broadcast system according to claim 8, wherein the digital broadcast system is displayed on a screen. 10. The receiving means includes a notifying means for notifying a viewer that there is information linked to the analog broadcast by using information related to the analog broadcast or a sound effect displayed on a screen. The digital broadcasting system according to claim 6, wherein: