CN101217650A - A terrestrial broadcasting digital TV receiver, control method and system - Google Patents
A terrestrial broadcasting digital TV receiver, control method and system Download PDFInfo
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- CN101217650A CN101217650A CNA2007101257041A CN200710125704A CN101217650A CN 101217650 A CN101217650 A CN 101217650A CN A2007101257041 A CNA2007101257041 A CN A2007101257041A CN 200710125704 A CN200710125704 A CN 200710125704A CN 101217650 A CN101217650 A CN 101217650A
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Abstract
The invention discloses a ground broadcasting digital television receiver, a control method thereof and a system thereof. The control method comprises the following steps: a digital signal modem is controlled to lock a frequency point and a plurality of channels of television programs with a specified frequency point and TS of PSI are received; on the basis of the PSI, the specified PID corresponding to each multimedia streaming of at least one channel television program of a plurality of channels of television programs is available; the digital signal modem is controlled to filter the PID of each multimedia streaming and the specified TS of at least one channel of television programs is obtained. The invention is suitable for the standards of various ground broadcasting digital televisions. Due to controlling the digital signal modem only to deal with the channel of a television program that needs to be broadcast and filter other channels of television programs by software, the bit stream of the TS of the processed television program lessens, thus meeting the demand of a low-end processor and not affecting broadcasting video effect caused by the limitation of interface transmission speed; in addition, the invention does not increase hardware cost, has comparatively low cost and can be relatively flexibly used.
Description
Technical field
The invention belongs to digital TV field, relate in particular to a kind of terrestrial broadcasting digital television receiving apparatus, control method and system.
Background technology
Along with the development of portable terminal and Digital Television, the terrestrial broadcasting digital television techniques has become the transmission technology that television services is provided for portable terminal gradually.At present, the terrestrial broadcasting digital television standard of approving through International Telecommunication Association (ITU) has three, comprises the DVB-T standard in Europe, the T-DMB of the U.S. and the ISDB-T of Japan.
Make portable terminal (for example notebook computer, mobile phone, PDA, vehicle-mounted receiving terminal etc.) receive the terrestrial broadcasting Digital Television, then need on portable terminal, increase or connect the terrestrial broadcasting digital television receiving apparatus.See also Fig. 1, existing terrestrial broadcasting digital television receiving apparatus adopts USB interface usually, and this device generally includes: antenna, digital signal modulator-demodulator, USB interface and processor (for example hardware platform Au1200).Wireless signal is converted to the intermediate-freuqncy signal of fixed frequency by the digital signal modulator-demodulator after antenna receives, be sent to USB interface then, what this USB interface received is the multiplexed signals of TS (Transport Stream transmits data flow), includes multi-channel tv programs in the TS stream.
Yet because processor (for example hardware platform Au1200) is during as main frame, the transmission rate of the maximum of USB interface can only reach 12Mbps, and the TS of complete Digital Television stream generally is 30Mbps, so USB interface can not satisfy the requirement that receives fully.Yet prior art all is that TS stream is all received, thereby the video effect that causes the TS of all road TV programme that comprise a certain frequency of receiving to spread putting is bad, mosaic occurs, and serious can't play.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of terrestrial broadcasting digital television receiving apparatus, control method and system that can not influence the video effect of broadcast because of the restriction of transmission rate.
For solving the problems of the technologies described above, the invention provides a kind of terrestrial broadcasting Digital Television acceptance control method, it may further comprise the steps:
Control figure signal modem locked frequency point receives and to comprise the multi-channel tv programs of specifying frequency and the transmission data flow TS of program specific information PSI;
Obtain the Process identifier PID of each media stream correspondence of at least one road TV programme in the described multi-channel tv programs of appointment according to described PSI;
The control figure signal modem filters the PID of described each media stream, obtains the TS of at least one road TV programme of described appointment.
The present invention also provides a kind of terrestrial broadcasting Digital Television receiving control system, and it comprises:
The frequency locking control module is used for control figure signal modem locked frequency point, receives to comprise the multi-channel tv programs of specifying frequency and the TS of PSI;
The PID acquisition module is used for obtaining according to described PSI the PID of each media stream correspondence of at least one road TV programme of the described multi-channel tv programs of appointment;
The TV programme filtering module is used for the PID that the control figure signal modem filters described each media stream, obtains the TS of at least one road TV programme of described appointment.
The present invention also provides a kind of terrestrial broadcasting digital television receiving apparatus, it comprises antenna, digital signal modulator-demodulator and processor, its described device also comprises terrestrial broadcasting Digital Television receiving control system, and described terrestrial broadcasting Digital Television receiving control system comprises:
The frequency locking control module is used for control figure signal modem locked frequency point, receives to comprise the multi-channel tv programs of specifying frequency and the TS of PSI;
The PID acquisition module is used for obtaining according to described PSI the PID of each media stream correspondence of at least one road TV programme of the described multi-channel tv programs of appointment;
The TV programme filtering module is used for the PID that the control figure signal modem filters described each media stream, obtains the TS of at least one road TV programme of described appointment.
The present invention is owing to come that road TV programme that the control figure signal modem is only handled needs broadcast by software, other road TV programme are filtered out, therefore the TV programme TS code stream of handling diminishes, can satisfy the requirement of low side processor, and can not influence the video effect of broadcast because of the restriction of interface transmission rate; In addition, therefore the present invention need not increase the cost of hardware owing to adopt software to control, and cost is lower, and uses more flexible.
Description of drawings
Fig. 1 is the terrestrial broadcasting digital television receiving apparatus functional block diagram that prior art provides.
Fig. 2 is the terrestrial broadcasting Digital Television acceptance control method flow chart that the embodiment of the invention provides.
Fig. 3 is the terrestrial broadcasting Digital Television receiving control system functional block diagram that the embodiment of the invention provides.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Because the intermediate-freuqncy signal of the fixed frequency of wireless signal after the conversion of digital signal modulator-demodulator that receives from the antenna of terrestrial broadcasting digital television receiving apparatus is the complete TS stream that has comprised multi-channel tv programs, and in fact the terrestrial broadcasting digital television receiving apparatus at a time only needs to handle one the tunnel for the TV programme of playing, so the terrestrial broadcasting digital television receiving apparatus that the embodiment of the invention provides is only handled that road TV programme that needs broadcast by a certain moment of software control digital signal modulator-demodulator, and other road TV programme are filtered out.
See also Fig. 2, the terrestrial broadcasting Digital Television acceptance control method that the embodiment of the invention provides may further comprise the steps:
S11, control figure signal modem locked frequency point receive and to comprise that the multi-channel tv programs of specifying frequency and the TS of PSI information (Program Specific Information, program specific information) flow, and the PSI information spinner will comprise following table:
PAT (Program Association Table, the program correlation table): the PID of this table (Process ID, Process identifier) is the 0x0000 that fixes, the main effect of pat table is to point out this TS stream ID, and PMT (the Program Map Table of pairing several roads TV programme in this road TS stream, the program table of comparisons) and the PID of NIT (Network Information Table, network information table);
PMT: the PID of this table is by the pat table appointment, can obtain the information that comprises in one tunnel TV programme by this table, for example, this road TV programme constitutes type (video with these streams by which stream, audio frequency, data), the corresponding PID of each stream in the designated television program;
NIT: the PID of this table is specified by PAT, the effect of NIT mainly is the identification to multichannel TS stream, and NIT provides multichannel TS stream, some relevant information of physical network and Network Transmission, as be used for tuning frequency information and coded system, the information of parameter aspects such as modulation system;
CAT (Conditional Access Table, conditional access table): PID-0x0001;
S12, obtain the PID of each media stream correspondence of at least one road TV programme (following is example with one tunnel TV programme) in the multi-channel tv programs of appointment according to this PSI; Specifically may further comprise the steps:
S121, control figure signal modem filter the PID of PAT, obtain pat table;
S122, from this pat table, obtain the PID of PMT;
S123, control figure signal modem filter the PID of PMT, obtain pmt table;
S124, from this pmt table, obtain the corresponding PID of each media stream in one tunnel TV programme of appointment (for example video, audio frequency, data);
S13, control figure signal modem filter the PID of this each media stream (for example video, audio frequency, data), obtain the TS stream of one tunnel TV programme of appointment; The received television program speed of this moment has satisfied the requirement of processor (for example Au1200 platform) less than 12Mbps; Behind the TS stream that need to obtain, carry out demultiplexing according to TS stream and obtain media stream, play in the Au1200 platform decoding back.
See also Fig. 3, the terrestrial broadcasting Digital Television receiving control system that the embodiment of the invention provides comprises frequency locking control module 1, PID acquisition module 2 and TV programme filtering module 3, and this PID acquisition module 2 comprises that specifically PID that PAT filters submodule 21, PMT obtains the PID that submodule 22, PMT filter submodule 23 and media stream and obtains submodule 24.Frequency locking control module 1 control figure signal modem locked frequency point receives and to comprise the multi-channel tv programs of specifying frequency and the TS of PSI; PID acquisition module 2 is according to the PID of each media stream correspondence of at least one road TV programme in the described multi-channel tv programs of described PSI acquisition appointment; Be specially: the PAT of PID acquisition module 2 filters the PID of submodule 21 according to described PSI control figure signal modem filtration PAT, obtains PAT; The PID of PMT obtains submodule 22 obtains PMT from described PAT PID; PMT filters the PID that submodule 23 control figure signal modems filter described PMT, obtains PMT; The PID of media stream obtains the PID of each media stream correspondence of at least one road TV programme in submodule 24 obtains appointment from described PMT the described multi-channel tv programs; At last, TV programme filtering module 3 control figure signal modems filter the PID of described each media stream, obtain the TS of at least one road TV programme of described appointment.
The terrestrial broadcasting digital television receiving apparatus that the embodiment of the invention provides comprises the terrestrial broadcasting Digital Television receiving control system that antenna, digital signal modulator-demodulator, USB interface, processor and the embodiment of the invention provide.Wireless signal is converted to the intermediate-freuqncy signal of fixed frequency by the digital signal modulator-demodulator after antenna receives, the terrestrial broadcasting Digital Television receiving control system control figure signal modem that provides through the embodiment of the invention is only handled that road TV programme that needs broadcast then, and other road TV programme are filtered out; Be sent to USB interface at last, at this moment, what this USB interface received is the TS stream of that road TV programme of appointment, is sent to processor by USB interface then and plays.
The present invention is owing to come that road TV programme that the control figure signal modem is only handled needs broadcast by software, other road TV programme are filtered out, and the code stream of a cover SD program approximately is 8Mbps, 12Mbps less than Au1200, so just can realize the complete reception of data, can satisfy the requirement of low side processor, and can not influence the video effect of broadcast because of the restriction of interface transmission rate; In addition, therefore the present invention need not increase the cost of hardware owing to adopt software to control, and cost is lower, and uses more flexible.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be in being stored in a computer read/write memory medium, described storage medium is as ROM/RAM, disk, CD etc.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a terrestrial broadcasting Digital Television acceptance control method is characterized in that, may further comprise the steps:
Control figure signal modem locked frequency point receives and to comprise the multi-channel tv programs of specifying frequency and the transmission data flow TS of program specific information PSI;
Obtain the Process identifier PID of each media stream correspondence of at least one road TV programme in the described multi-channel tv programs of appointment according to described PSI;
The control figure signal modem filters the PID of described each media stream, obtains the TS of at least one road TV programme of described appointment.
2. terrestrial broadcasting Digital Television acceptance control method as claimed in claim 1, it is characterized in that the step of the PID of each media stream correspondence of at least one road TV programme in the described described multi-channel tv programs that obtains appointment according to described PSI specifically may further comprise the steps:
According to the PID of described PSI control figure signal modem filtrating program correlation table PAT, obtain PAT;
From described PAT, obtain the PID of program table of comparisons PMT;
The control figure signal modem filters the PID of described PMT, obtains PMT;
The PID of each media stream correspondence of at least one road TV programme from described PMT in the described multi-channel tv programs of acquisition appointment.
3. terrestrial broadcasting Digital Television acceptance control method as claimed in claim 1 is characterized in that described PSI comprises PAT and PMT, and described PAT has specified the PID of described PMT, and described PMT has specified the PID of each media stream correspondence of TV programme.
4. a terrestrial broadcasting Digital Television receiving control system is characterized in that, comprising:
The frequency locking control module is used for control figure signal modem locked frequency point, receives to comprise the multi-channel tv programs of specifying frequency and the TS of PSI;
The PID acquisition module is used for obtaining according to described PSI the PID of each media stream correspondence of at least one road TV programme of the described multi-channel tv programs of appointment;
The TV programme filtering module is used for the PID that the control figure signal modem filters described each media stream, obtains the TS of at least one road TV programme of described appointment.
5. terrestrial broadcasting Digital Television receiving control system as claimed in claim 4 is characterized in that, described PID acquisition module specifically comprises:
PAT filters submodule, is used for filtering according to described PSI control figure signal modem the PID of PAT, obtains PAT;
The PID of PMT obtains submodule, is used for obtaining from described PAT the PID of PMT;
PMT filters submodule, is used for the PID that the control figure signal modem filters described PMT, obtains PMT;
The PID of media stream obtains submodule, is used for the PID of each media stream correspondence of at least one road TV programme from the described multi-channel tv programs of described PMT acquisition appointment.
6. terrestrial broadcasting Digital Television receiving control system as claimed in claim 4 is characterized in that described PSI comprises PAT and PMT, and described PAT has specified the PID of described PMT, and described PMT has specified the PID of each media stream correspondence of TV programme.
7. terrestrial broadcasting digital television receiving apparatus, it comprises antenna, digital signal modulator-demodulator and processor, it is characterized in that described device also comprises terrestrial broadcasting Digital Television receiving control system, described terrestrial broadcasting Digital Television receiving control system comprises:
The frequency locking control module is used for control figure signal modem locked frequency point, receives to comprise the multi-channel tv programs of specifying frequency and the TS of PSI;
The PID acquisition module is used for obtaining according to described PSI the PID of each media stream correspondence of at least one road TV programme of the described multi-channel tv programs of appointment;
The TV programme filtering module is used for the PID that the control figure signal modem filters described each media stream, obtains the TS of at least one road TV programme of described appointment.
8. terrestrial broadcasting digital television receiving apparatus as claimed in claim 7 is characterized in that, described PID acquisition module specifically comprises:
PAT filters submodule, is used for filtering according to described PSI control figure signal modem the PID of PAT, obtains PAT;
The PID of PMT obtains submodule, is used for obtaining from described PAT the PID of PMT;
PMT filters submodule, is used for the PID that the control figure signal modem filters described PMT, obtains PMT;
The PID of media stream obtains submodule, is used for the PID of each media stream correspondence of at least one road TV programme from the described multi-channel tv programs of described PMT acquisition appointment.
9. terrestrial broadcasting digital television receiving apparatus as claimed in claim 7 is characterized in that, described device also comprises the USB interface that is connected between described digital signal modulator-demodulator and the processor.
10. terrestrial broadcasting digital television receiving apparatus as claimed in claim 7 is characterized in that described PSI comprises PAT and PMT, and described PAT has specified the PID of described PMT, and described PMT has specified the PID of each media stream correspondence of TV programme.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101257041A CN101217650A (en) | 2007-12-28 | 2007-12-28 | A terrestrial broadcasting digital TV receiver, control method and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101257041A CN101217650A (en) | 2007-12-28 | 2007-12-28 | A terrestrial broadcasting digital TV receiver, control method and system |
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| CN101217650A true CN101217650A (en) | 2008-07-09 |
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| CNA2007101257041A Pending CN101217650A (en) | 2007-12-28 | 2007-12-28 | A terrestrial broadcasting digital TV receiver, control method and system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888543A (en) * | 2010-06-10 | 2010-11-17 | 青岛海信宽带多媒体技术有限公司 | Method and device for transmitting television signals in local area network (LAN) |
| CN101969749A (en) * | 2010-09-19 | 2011-02-09 | 中兴通讯股份有限公司 | Wireless communication device |
| CN103155454A (en) * | 2010-05-19 | 2013-06-12 | 弗兰霍菲尔运输应用研究公司 | Transport stream provider, dab signal provider, transport stream analyzer, dab receiver, method, computer program and transport stream signal |
| CN103686299A (en) * | 2013-07-05 | 2014-03-26 | 郑州威科姆科技股份有限公司 | Universal digital TV playing method based on android terminal device |
| CN107360464A (en) * | 2017-09-05 | 2017-11-17 | 珠海迈科智能科技股份有限公司 | A kind of transcoding device and method |
-
2007
- 2007-12-28 CN CNA2007101257041A patent/CN101217650A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103155454A (en) * | 2010-05-19 | 2013-06-12 | 弗兰霍菲尔运输应用研究公司 | Transport stream provider, dab signal provider, transport stream analyzer, dab receiver, method, computer program and transport stream signal |
| US9307287B2 (en) | 2010-05-19 | 2016-04-05 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Transport-stream provider, DAB signal provider, transport stream analyzer, DAB receiver, method, computer program, and transport stream signal |
| CN103155454B (en) * | 2010-05-19 | 2017-04-26 | 弗劳恩霍夫应用研究促进协会 | Digital multimedia broadcast with valid data transmission for restricting access in transmission stream packet including program association table (PAT) |
| US9986287B2 (en) | 2010-05-19 | 2018-05-29 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. | Transport stream provider, DAB signal provider, transport stream analyzer, DAB receiver, method, computer program, and transport stream signal |
| CN101888543A (en) * | 2010-06-10 | 2010-11-17 | 青岛海信宽带多媒体技术有限公司 | Method and device for transmitting television signals in local area network (LAN) |
| CN101969749A (en) * | 2010-09-19 | 2011-02-09 | 中兴通讯股份有限公司 | Wireless communication device |
| CN103686299A (en) * | 2013-07-05 | 2014-03-26 | 郑州威科姆科技股份有限公司 | Universal digital TV playing method based on android terminal device |
| CN107360464A (en) * | 2017-09-05 | 2017-11-17 | 珠海迈科智能科技股份有限公司 | A kind of transcoding device and method |
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Open date: 20080709 |