CN108566556A - A kind of set-top-box system and method for supporting two-way ground digital television broadcast - Google Patents
A kind of set-top-box system and method for supporting two-way ground digital television broadcast Download PDFInfo
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- CN108566556A CN108566556A CN201810182902.XA CN201810182902A CN108566556A CN 108566556 A CN108566556 A CN 108566556A CN 201810182902 A CN201810182902 A CN 201810182902A CN 108566556 A CN108566556 A CN 108566556A
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- demodulating unit
- output end
- programs
- tuning
- module
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4135—Peripherals receiving signals from specially adapted client devices external recorder
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/418—External card to be used in combination with the client device, e.g. for conditional access
- H04N21/4183—External card to be used in combination with the client device, e.g. for conditional access providing its own processing capabilities, e.g. external module for video decoding
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/426—Internal components of the client ; Characteristics thereof
- H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
- H04N21/4263—Internal components of the client ; Characteristics thereof for processing the incoming bitstream involving specific tuning arrangements, e.g. two tuners
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4334—Recording operations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
- H04N21/4383—Accessing a communication channel
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a kind of set-top-box systems and method for supporting two-way ground digital television broadcast, the radiofrequency signal input interface output end of system is connect with the first tuning demodulating unit input terminal, first tuning demodulating unit output end is connect with second tune demodulating unit input terminal, first tuning demodulating unit, second tune demodulating unit output end is connect with demultiplexing module, demultiplexing module output end connects decoder, decoder output connects module of televising by output interface, second tune demodulating unit output end is also connect with CPU input terminals, CPU output ends connect smart card reader, backstage imprinting module, imprinting module output end in backstage connects hard disk.The present invention locks two-way different frequent points simultaneously, is used for watching all the way, and another way wants the program seen for imprinting, and after record, and the time of broadcasting, user used experience meeting more preferably also than freedom, it can be achieved that PIP functions play two program pictures simultaneously.
Description
Technical field
The present invention relates to tv broadcasting technology field more particularly to a kind of machine tops for supporting two-way ground digital television broadcast
Box system and method.
Background technology
DVB-T (Digital Video Broadcasting-Terrestrial), Chinese can be understood as digital ground
Television broadcasting system standard, as current commercialization, a kind of digital TV broadcast standards, operation strategies are main
In Europe.Its key property can be summarized as follows several points：It improves the performance of single frequency network, be suitable for mobile and fixed receiver
Program transmission, reduce peak-to-average power ratio, to reduce the cost etc. of transmitting terminal.DVB-T maximum features are exactly TV Festival
Height of eye is clear, free of discontinuities in galloping can receive TV programme.This is not available for conventional analog signal TV
, it may be said that the shortcomings that simulated television, all perfectly solved by DVB-T.
Set-top box quality at present on the market is irregular, and can only support the input of signal source all the way, is that can not expire
Sufficient client will watch different this demand of program simultaneously, and part set-top box is the applied code for being unable to reach country.
Invention content
In view of the drawbacks described above of the prior art, technical problem to be solved by the invention is to provide a kind of support two-way
The set-top-box system and method for face digital television broadcasting, so as to solve the deficiencies in the prior art.
To achieve the above object, the present invention provides a kind of set-top-box system for supporting two-way ground digital television broadcast,
Including radiofrequency signal input interface, first tuning demodulating unit, second tune demodulating unit, CPU, demultiplexing module, decoder,
Output interface, backstage imprinting module, hard disk, the radiofrequency signal input interface output end and the first tuning demodulating unit input terminal
Connection, the first tuning demodulating unit output end are connect with second tune demodulating unit input terminal, the first tuning demodulation
Unit, second tune demodulating unit output end are connect with demultiplexing module, and the demultiplexing module output end connects decoder,
The decoder output is televised module by output interface connection, the second tune demodulating unit output end also with
CPU input terminals connect, the CPU output ends connection smart card reader, backstage imprinting module, the backstage imprinting module output
End connection hard disk.
A kind of above-mentioned set-top-box system for supporting two-way ground digital television broadcast, the first tuning demodulating unit are defeated
Outlet is exported by phaselocked loop and is connect with second tune demodulating unit input terminal.
A kind of above-mentioned set-top-box system for supporting two-way ground digital television broadcast, the first tuning demodulating unit,
Second tune demodulating unit includes tuner, demodulator.
A kind of above-mentioned set-top-box system for supporting two-way ground digital television broadcast, the output interface include but unlimited
In HDMI interface, CVBS interfaces.
A kind of set-top box method for supporting two-way ground digital television broadcast, includes the following steps：
Step 1, the first tuning demodulating unit locking need the program frequency point played to play, and rf-signal modulation is demodulated into
Original TS streams, original TS streams become original audio, video data and programme information by demultiplexing module demultiplexing, then pass through
It is played on TV after crossing decoder decoding；
Step 2, when needing to see that A programs imprinting B programs simultaneously, the first tuning demodulating unit lockked the frequency point of B programs, just
After imprinting button being pressed when playing B programs, the frequency point of the B programs of second tune demodulating unit locking at this time, the first tuning demodulation
Unit only locks the frequency point of A programs at this time, and the A program TS flow datas that the first tuning demodulating unit demodulates are input to demultiplexing mould
Block；
The B program TS flow datas that step 3, second tune demodulating unit demodulate are sent into master chip, master chip control backstage
Imprinting module carries out imprinting to B programs, and hard disk is arrived in storage；Meanwhile B program TS flow datas are input to demultiplexing module；
A program TS flow datas and B program TS flow datas are sent into decoder decoding by step 4, demultiplexing module, are then exported
Interface feeding is televised, and wherein setting A programs and B programs to wicket all the way plays realization PIP functions.
A kind of above-mentioned set-top box method for supporting two-way ground digital television broadcast, B program TS fluxions in the step 3
According in preservation in a hard disk a newly-built TS media file.
The beneficial effects of the invention are as follows：
Set-top-box system provided by the invention can utilize the modem chip of the DVB-T of two-way to work at the same time, simultaneously
Two-way different frequent points are locked, are used for watching all the way, another way can be used to the program that imprinting is wanted to see, for subsequently watching.Thus
It may be implemented to mend and see another while the program played.And after recording, the time of broadcasting, user used also than freedom
Experience can be more preferable.PIP functions can be realized simultaneously while playing two program pictures.
The technique effect of the design of the present invention, concrete structure and generation is described further below with reference to attached drawing, with
It is fully understood from the purpose of the present invention, feature and effect.
Description of the drawings
Fig. 1 is the system block diagram of the present invention.
Fig. 2 is flow chart of the method for the present invention.
Specific implementation mode
As shown in Figure 1, a kind of set-top-box system for supporting two-way ground digital television broadcast, including radiofrequency signal input connect
Mouth, the first tuning demodulating unit, second tune demodulating unit, CPU, demultiplexing module, decoder, output interface, backstage imprinting
Module, hard disk, the radiofrequency signal input interface output end are connect with the first tuning demodulating unit input terminal, first tuning
Demodulating unit output end is connect with second tune demodulating unit input terminal, the first tuning demodulating unit, second tune demodulation
Unit output end is connect with demultiplexing module, and the demultiplexing module output end connects decoder, the decoder output
Module of televising is connected by output interface, the second tune demodulating unit output end is also connect with CPU input terminals, described
CPU output ends connect smart card reader, backstage imprinting module, and the backstage imprinting module output end connects hard disk.
In the present embodiment, the first tuning demodulating unit output end passes through phaselocked loop output and second tune demodulating unit
Input terminal connects.
In the present embodiment, the first tuning demodulating unit, second tune demodulating unit include tuner, demodulator.
In the present embodiment, the output interface includes but not limited to HDMI interface, CVBS interfaces.
As shown in Fig. 2, a kind of set-top box method for supporting two-way ground digital television broadcast, includes the following steps：
Step 1, the first tuning demodulating unit locking need the program frequency point played to play, and rf-signal modulation is demodulated into
Original TS streams, original TS streams become original audio, video data and programme information by demultiplexing module demultiplexing, then pass through
It is played on TV after crossing decoder decoding；
Step 2, when needing to see that A programs imprinting B programs simultaneously, the first tuning demodulating unit lockked the frequency point of B programs, just
After imprinting button being pressed when playing B programs, the frequency point of the B programs of second tune demodulating unit locking at this time, the first tuning demodulation
Unit only locks the frequency point of A programs at this time, and the A program TS flow datas that the first tuning demodulating unit demodulates are input to demultiplexing mould
Block；
The B program TS flow datas that step 3, second tune demodulating unit demodulate are sent into master chip, master chip control backstage
Imprinting module carries out imprinting to B programs, and hard disk is arrived in storage；Meanwhile B program TS flow datas are input to demultiplexing module；
A program TS flow datas and B program TS flow datas are sent into decoder decoding by step 4, demultiplexing module, are then exported
Interface feeding is televised, and wherein setting A programs and B programs to wicket all the way plays realization PIP functions.
In the present embodiment, B programs TS flow datas preserve a newly-built TS media file in a hard disk in the step 3
In.
The implementation method of the present invention is specific as follows：
As shown in Figure 1, DVB-T refers to the standard for carrying out MPEG-2 Digital Transmissions using Open circuit ground transmission medium, it is adopted
In channel modulation techniques digital TV set-top-box system with Coded Orthogonal Frequency Division Multiplexing (COFDM), in general tuner is negative
Duty digital television signal is humorous, and demodulation chip is responsible for demodulated signal, they coordinate together with decomposition multiplex module and decoder, real
Receiving the decode for digital television signal is showed.So after tuner is tuned as intermediate-freuqncy signal over there, demodulation chip will be born
Duty demodulation intermediate-freuqncy signal is that original TS flows, then by decomposition multiplex module demultiplex the data of TS, unpacks out audio and video
Data and various program information tables.In addition, smart card reader be responsible for understand CA cards and to scrambled program descrambled with
And correlation DVB business processings.
The solution of the present invention is mainly using two independent tuning chips and two independent demodulation chips come work simultaneously
Make, two different frequency points is locked, to the program (PIP) for reaching while watching two different frequent points and across frequency point backstage imprinting
Function.
Main realization step is：
1, user's booting broadcasting or zapping：First via tuning demodulating unit locking needs the program frequency point played, in handle
Audio, video data after demultiplexing is sent into decoder and is decoded, and is output in the output interfaces such as HDMI.
2, A and B programs play simultaneously, but the two programs user wants to see, see A programs, backstage imprinting B programs, later
Review B programs：When the first via has lockked the frequency point of B programs, and after playing, after user presses imprinting button, the second tunnel
Tuning demodulating unit will lock the frequency points of B programs, after receiving the intermediate-freuqncy signal that tuning demodulating unit is brought, the second tunnel
Demodulation chip, which proceeds by, demodulates DVB-T signals, and the TS that will demodulate the TS flow datas feeding master chip come
PORT2 (TS of master chip flows input interface).Then master chip is mounted to the data of TS PORT2 in demultiplexer and is solved
Multiplexing, and the data of the audio and video of the program are stored in the next newly-built TS media files of hard disc apparatus；Pass through at this time
Upper incision platform is watched to program A, in this way backstage also recording programs B at the same time.
For PIP (picture-in-picture) while two different frequent points programs are watched, two-way tuning demodulating unit locks difference respectively
Frequency point, then two-way demodulation chip the intermediate-freuqncy signal for carrying out the different frequent points that self-tuning demodulating unit sends over is demodulated,
The TS of demodulation is streamed toward demultiplexer and is demultiplexed, the original audio, video data that two-way demultiplexes out is put into the first via
It is played out with No. two players, and will wherein play all the way and be set as wicket broadcasting, thus realize PIP functions.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that those skilled in the art without
It needs creative work according to the present invention can conceive and makes many modifications and variations.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical solution, all should be in the protection domain being defined in the patent claims.
Claims (6)
1. a kind of set-top-box system for supporting two-way ground digital television broadcast, it is characterised in that：It is connect including radiofrequency signal input
Mouth, the first tuning demodulating unit, second tune demodulating unit, CPU, demultiplexing module, decoder, output interface, backstage imprinting
Module, hard disk, the radiofrequency signal input interface output end are connect with the first tuning demodulating unit input terminal, first tuning
Demodulating unit output end is connect with second tune demodulating unit input terminal, the first tuning demodulating unit, second tune demodulation
Unit output end is connect with demultiplexing module, and the demultiplexing module output end connects decoder, the decoder output
Module of televising is connected by output interface, the second tune demodulating unit output end is also connect with CPU input terminals, described
CPU output ends connect smart card reader, backstage imprinting module, and the backstage imprinting module output end connects hard disk.
2. a kind of set-top-box system for supporting two-way ground digital television broadcast as described in claim 1, it is characterised in that：Institute
The first tuning demodulating unit output end is stated to connect with second tune demodulating unit input terminal by phaselocked loop output.
3. a kind of set-top-box system for supporting two-way ground digital television broadcast as described in claim 1, it is characterised in that：Institute
It includes tuner, demodulator to state the first tuning demodulating unit, second tune demodulating unit.
4. a kind of set-top-box system for supporting two-way ground digital television broadcast as described in claim 1, it is characterised in that：Institute
It includes but not limited to HDMI interface, CVBS interfaces to state output interface.
5. a kind of set-top box method for supporting two-way ground digital television broadcast, which is characterized in that include the following steps：
Step 1, the first tuning demodulating unit locking need the program frequency point played to play, and rf-signal modulation are demodulated into original
TS stream, original TS stream by demultiplexing module demultiplex becomes original audio, video data and programme information, using solution
It is played on TV after code device decoding；
Step 2, when needing to see that A programs imprinting B programs simultaneously, the first tuning demodulating unit lockked the frequency point of B programs, broadcast
After pressing imprinting button when putting B programs, the frequency point of the B programs of second tune demodulating unit locking at this time, the first tuning demodulating unit
The frequency point of A programs is only locked at this time, and the A program TS flow datas that the first tuning demodulating unit demodulates are input to demultiplexing module；
The B program TS flow datas that step 3, second tune demodulating unit demodulate are sent into master chip, and master chip controls backstage imprinting
Module carries out imprinting to B programs, and hard disk is arrived in storage；Meanwhile B program TS flow datas are input to demultiplexing module；
A program TS flow datas and B program TS flow datas are sent into decoder decoding by step 4, demultiplexing module, then output interface
Feeding is televised, and wherein setting A programs and B programs to wicket all the way plays realization PIP functions.
6. a kind of set-top box method for supporting two-way ground digital television broadcast as claimed in claim 5, it is characterised in that：Institute
B programs TS flow datas in step 3 are stated to preserve in a newly-built TS media file in a hard disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810182902.XA CN108566556A (en) | 2018-03-06 | 2018-03-06 | A kind of set-top-box system and method for supporting two-way ground digital television broadcast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810182902.XA CN108566556A (en) | 2018-03-06 | 2018-03-06 | A kind of set-top-box system and method for supporting two-way ground digital television broadcast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108566556A true CN108566556A (en) | 2018-09-21 |
Family
ID=63531379
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810182902.XA Pending CN108566556A (en) | 2018-03-06 | 2018-03-06 | A kind of set-top-box system and method for supporting two-way ground digital television broadcast |
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| CN (1) | CN108566556A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109089066A (en) * | 2018-10-11 | 2018-12-25 | 珠海佳讯赛特电子有限公司 | Multiple signals input digital terrestrial coding demodulator |
| CN110557686A (en) * | 2019-09-27 | 2019-12-10 | 四川九州电子科技股份有限公司 | System and method for realizing playing satellite low-bit-rate live broadcast program by mobile terminal |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1297694A2 (en) * | 2000-06-21 | 2003-04-02 | Koninklijke Philips Electronics N.V. | Multi-window television receiver for simultaneously displaying two video programs and an electronic program guide |
| CN101453594A (en) * | 2007-12-07 | 2009-06-10 | 上海晨兴电子科技有限公司 | Method and apparatus implementing picture-in-picture and instant playing and recording function by mobile phone television |
| CN102088632A (en) * | 2010-12-09 | 2011-06-08 | 深圳国微技术有限公司 | Condition receiving apparatus capable of supporting two program sources and implementation method thereof |
-
2018
- 2018-03-06 CN CN201810182902.XA patent/CN108566556A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1297694A2 (en) * | 2000-06-21 | 2003-04-02 | Koninklijke Philips Electronics N.V. | Multi-window television receiver for simultaneously displaying two video programs and an electronic program guide |
| CN101453594A (en) * | 2007-12-07 | 2009-06-10 | 上海晨兴电子科技有限公司 | Method and apparatus implementing picture-in-picture and instant playing and recording function by mobile phone television |
| CN102088632A (en) * | 2010-12-09 | 2011-06-08 | 深圳国微技术有限公司 | Condition receiving apparatus capable of supporting two program sources and implementation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109089066A (en) * | 2018-10-11 | 2018-12-25 | 珠海佳讯赛特电子有限公司 | Multiple signals input digital terrestrial coding demodulator |
| CN110557686A (en) * | 2019-09-27 | 2019-12-10 | 四川九州电子科技股份有限公司 | System and method for realizing playing satellite low-bit-rate live broadcast program by mobile terminal |
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Application publication date: 20180921 |
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