CN1722787A - A C-3 common interface module apparatus - Google Patents
A C-3 common interface module apparatus Download PDFInfo
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- CN1722787A CN1722787A CNA2004100527497A CN200410052749A CN1722787A CN 1722787 A CN1722787 A CN 1722787A CN A2004100527497 A CNA2004100527497 A CN A2004100527497A CN 200410052749 A CN200410052749 A CN 200410052749A CN 1722787 A CN1722787 A CN 1722787A
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Abstract
This invention discloses a device for extracting AC-3 acoustic frequency data from the broadcasting program and output AC-3CI module after switching in the digital broadcasting receiver, characterized in that the AC-3CI module has a function of extracting and outputting AC-3 acoustic frequency data from TS data, so even the digital TV dose not have that function, the user can switch the AC-3CI module to the receiver and listen AC-3 acoustic frequency through connecting to the external decoder; besides, the invention is based on the CI rule, so it does not need other hardware or software.
Description
Technical field
Extract the AC-3 voice data in the playing program and outwards export AC-3CI (generic interface) modular device after the present invention relates to be linked into digital broadcast receiver, particularly be provided with behind the TS data extract AC-3 voice data the outwards function of output in the middle of the AC-3CI modular device, even if thereby in the middle of digital TV, do not have the extraction of AC-3 voice data and the function of outwards exporting, the user also can be linked into receiver to above-mentioned AC-3CI module, also can listen to the AC-3 audio frequency by connecting outer decoder.
Background technology
What AC-3 adopted is digital ground frequency TV audio standard, is the U.S. prominent the third form of flying research institute newly developed audio coding mode well-known with audio frequency noise technology for eliminating.That is, above-mentioned AC-3 can support the digital audio encoding format of maximum 5.1 channels, and it is mainly used in the compiling of the voice data of DVD video, but also brings into use in data playback recently.Then because adopted the extraction of AC-3 voice data and the function of outwards exporting, also begin constantly to occur using outer decoder just can listen to the digital broadcast receiver (hereinafter to be referred as receiver) of AC-3 audio frequency.
CI (Common Interface) is as the interface specification between receiver and the external module, and its external module is referred to as the CI module.Hardware and the application software that can carry out other functions that receiver can't carry out can be set in the above-mentioned CI module.
Figure 1 shows that by these CI and connect receiver 101 and CI module 104.
Above-mentioned CI be with the transmitting-receiving MPEG TS (Transport Stream) TS interface (Interface) 103 and CI104 in order to provide rich functions, 102 compositions of command interface (CommandInterface) that resource and application software communicate between the microprocessor computer 104a of the microprocessor computer of receiver 101 and CI module 104.Particularly have in resource that receiver 101 will be equipped with substantially and the agreement that in the CI module 104 of these resources of use, communicates with application software in definition in the middle of the mentioned order interface 102.Representative resource has MMI (Man Machine Interface) resource, and it is the input that CI module 104 interior application software can receive the user, also can export by the picture of receiver 101 information of necessity to the user simultaneously.
That is, the tuner 101a of receiver 101 in the RF signal that receives, the selected channel RF of only tuning user signal, thus with intermediate frequency (Intermediate Frequency; IF) download mixing (Down Mixing) back by demodulation section (demodulator) 101b output.If downloading the IF signal of mixing is digital broadcast, when load mode is the VSB mode, above-mentioned demodulation section 101 demodulation VSB are with the output of transportation streaming form.
At this moment, when CI module 104 was arranged on receiver 101, the TS of above-mentioned VSB demodulation section 101b output can be from the streaming handling part 104b output of CI module 104 by TS interface 103.
The streaming handling part 104b of above-mentioned CI module 104 can carry out function miscellaneous, for example: play if be used for charge, also can decipher or also can carry out encryption (decryption) to the TS from acceptance division 101 inputs.
Again after being input to the 101c of inverse multiplexing portion (demultiplexer) of acceptance division 101 by TS interface 103 from the TS of above-mentioned streaming handling part 104b output, be divided into video and audio frequency.The video streaming of separating can be exported from mpeg decoder 101d.
Above-mentioned mpeg decoder 101d returns to the pixel value of original picture at behind the video streaming length-changeable decoding (VLD) of the above-mentioned inverse multiplexing 101c of portion output by reverse quantization (IQ) process, inverse discrete cosine (IDCT) process and motion compensation (MC) process.
In addition, be input to the microprocessor computer 101e of receiver 101, communicate by the microprocessor computer of command interface 102 with CI module 104 by the exercises order meeting of remote controller input.
As previously mentioned, the digital broadcast receiver inside of high price has been equipped with the function that the AC-3 voice data extracts and outwards exports, and utilizes decoder also can listen to the AC-3 audio frequency simultaneously.
But it much is not have the extraction of AC-3 voice data and the function of outwards exporting that low price or popular digital broadcast receiver have.
In this case, even if transmit leg sends the AC-3 voice data, even and if the recipient has decoder, also have normally to listen to the AC-3 audio frequency.
Summary of the invention
The present invention designs and develops in order to address the above problem, purpose of the present invention is exactly the extraction of employing AC-3 voice data in the CI module and the function of outwards exporting, even if make it not have the digital broadcast receiver of extraction of AC-3 voice data and the outside function of exporting that the CI modular device (hereinafter to be referred as the AC-3CI module) that uses outer decoder can listen to the AC-3 audio frequency also can be provided.
In order to achieve the above object, AC-3CI modular device according to the present invention is to export with transportation streaming (TS) form behind the digital broadcast signal of the specific channel of demodulation, just begin to separate the TS that the digital broadcast receiver of decode video data and voice data exports from above-mentioned TS and filter the TS package that comprises the AC-3 voice data, thereby extract the filtration and the extraction unit of AC-3 voice data; Comprising the control part that above-mentioned AC-3 voice data and the PID child labourer suitable with the TS package give above-mentioned filtration and extraction unit; Control by above-mentioned control part is able to ON/OFF, and the TS data from above-mentioned receiver output is optionally outputed to the switch portion of above-mentioned filtration and extraction unit; After the AC-3 voice data that extracts from above-mentioned filtration and extraction unit converted to the form that is output to outside port, the AC-3CI module of forming to the buffer of outside port output was installed as its main feature in the mode of detaching.
The outside port of above-mentioned AC-3CI module is connected with outer decoder, thereby is output as characteristics by the AC-3 audio frequency of said external port output with external loudspeaker.
Above-mentioned control part makes its user select the outside output of AC-3 audio frequency by the menu of receiver, and the user is by menu item, and according to the situation that selected AC-3 audio frequency is outwards exported, the switch and the PID that control above-mentioned switch portion are output as characteristics.
Above-mentioned control part be to receiver the TS package PID that comprises AC-3 voice data in the program that the user listening to, the CA_PMT object that sends with above-mentioned AC-3CI module detects, analyzes is characteristics.
Other purposes of the present invention, characteristics and advantage can be known by the detailed description of accompanying drawing example.
Description of drawings
What Fig. 1 showed is by the be connected situation of CI receiver with other CI intermodules.
Fig. 2 be according to of the present invention, for the extraction of carrying out the AC-3 voice data and the outside CI modular structure figure of output function.
Fig. 3 be according to of the present invention, in order in receiver, to activate the menu in the AC-3 module, and the instance graph that communicates.
Fig. 4 be according to of the present invention, in order in receiver, to transmit user's selection to the AC-3CI module, and the instance graph that communicates.
The symbol description of accompanying drawing major part
101: receiver 102: command interface
103:TS interface 201: microprocessor computer
202: read-only memory 203: data storage
204: switch portion 205: filter and extraction unit
206: buffer storage
Embodiment
Below, exemplary construction of the present invention and its effect are described with reference to the accompanying drawings.As shown in drawings and the like this structure of the present invention and the effect of explanation illustrates by an example to I haven't seen you for ages, and described like this technology of the present invention thought and its core texture and effect can not be subjected to any restriction.
The present invention is proposed to be the AC-3CI module that can carry out extraction of AC-3 voice data and outside output function, thereby digital broadcast receiver is for the extraction of AC-3 voice data and outwards output, even if do not adopt related hardware and software user can listen to the AC-3 audio frequency with decoder in the same old way, this is its outstanding feature.
Fig. 2 is the achromatic map according to AC-3CI modular device of the present invention, and it has comprised that control by microprocessor computer 201 is able to folding and from the TS of the receiver output extraction for the AC-3 voice data, the switch portion 204 of exporting or blocking; Filter the TS package that contains the AC-3 voice data in the middle of the TS data by above-mentioned switch portion output, extract the filtration and the extraction unit 205 of AC-3 voice data then; And an AC-3 voice data that extracts is converted to and can forms to the buffer 206 of outside port output.
At this moment, microprocessor computer 201 is depended in the setting of the TS package PID (Packet ID) that filters in above-mentioned filtration and extraction unit 205.In addition, NM read-only memory (ROM) 202, data storage (RAM) 203 can comprise the program and the data of AC-3 CI module application software.In addition, the also necessary CIS of store initialization (Card Information Structure) in above-mentioned read-only memory 202.
So the mode of AC-3CI module operation is as follows in the middle of the present invention who constitutes.
That is, when the AC-3CI module was inserted into receiver, above-mentioned AC-3CI module directly outputed in the middle of the receiver by 103 TS that receive from receiver in TS interface.This moment, switch portion 204 was under the closing state according to the control of microprocessor computer.
Simultaneously, as will outwards export the AC-3 voice data time, along with the control of above-mentioned microprocessor computer 201, switch portion can represent the state of holding, and output to the data of receiver by TS interface 103, by above-mentioned switch portion 204 be input to filter and extraction unit 205 in the middle of.
Above-mentioned filtration and extraction unit 205 are filtered with the TS package that package ID (PID) includes the AC-3 voice data in the middle of by the TS data of above-mentioned switch portion 204 outputs, thereby extract the AC-3 voice data.Above-mentioned PID is provided by microprocessor computer 201.
That is, above-mentioned microprocessor computer 201 makes the PID that the PID of above-mentioned filtration and extraction unit 205 is set at the TS package that comprises the AC-3 voice data to control the TS package that comprises the AC-3 voice data in above-mentioned filtration and extraction unit 205.In addition, above-mentioned filtration and extraction unit 205 are only extracted the AC-3 voice data in the middle of the TS package that filters, with buffer 206 outputs.
Above-mentioned buffer 206 the AC-3 voice datas that extract be converted to can outside port output form, export with outside port then.At this moment, be connected with decoder in the middle of the said external port, the said external decoder outputs to above-mentioned AC-3 audio frequency in the external loudspeaker.
That is, even if digital TV does not have the AC-3 voice data to filter and abstraction function, the user still can listen to the AC-3 audio frequency by outer decoder.
And the application software in the above-mentioned AC-3CI module is carried out following function.
That is, feedback is sent to receiver to the menu item of AC-3CI module by the defined object of MMI resource from the ENTER_MENU object that receiver sends.Be the object of above-mentioned ENTER_MENU conduct according to the definition of CI specification, the AC-3CI module is fed back the menu that will activate storage inside to this.This menu is according to the embodiment of using software in the AC-3CI module, can become based on text or based on the menu of picture.
Fig. 3 is that the AC-3CI module utilizes menu item to transmit with receiver according to the High-Level MMI object of CI specification definition, and the menu that makes receiver can activate the AC-3CI module is the example of process.
At this moment, above-mentioned menu item also comprises the project of opening the AC-3 audio frequency or closing the outside outputs of control AC-3 audio frequency such as AC-3 audio frequency.The user selects when every, and receiver can be sent to the AC-3CI module to the object that comprises the option index, and what the application software in the above-mentioned AC-3CI module learned that the user selects by this is which.
Fig. 4 is that receiver utilizes the defined High-LeVel MMI of the index CI specification object of the selected menu item of user to be sent to the AC-3CI module, makes the AC-3CI module can know the process instance of user's option.
For example, the user selects ' opens AC-3 audio frequency ' time, and the application software in the AC-3CI module can be opened switch portion 204, sets the TS package PID that comprises the AC-3 voice data simultaneously, thereby the AC-3 voice data that extracts is outputed to outside port.At this moment, comprise the TS package PID of AC-3 voice data in the program that the user listening to, the CA_PMT object that can send to the AC-3CI module at analysis receiver therefrom.Above-mentioned CA_PMT is as the object of CI specification definition, and receiver is sent to the AC-3CI module beginning to carry out program when listening to (when channel switch or opening power).
When user selection ' pass AC-3 audio frequency ' time, the application software in the AC-3CI module is closed above-mentioned switch portion 204, exports to outside port thereby interrupt the AC-3 voice data.
So, the AC-3CI module person of being to use of the present invention utilizes the application software in the AC-3CI module, can control the extraction of AC-3 voice data and the function of outwards exporting by the menu of receiver.
As mentioned above, AC-3CI modular device according to the present invention has been equipped with from TS data extract voice data, then the outside function of exporting, therefore even if do not have the extraction of AC-3 voice data and outside output function in the middle of digital TV, the user can import to receiver to above-mentioned AC-3CI module and be connected with outer decoder and listen to the AC-3 audio frequency.The present invention communicates by defined object of CI specification and receiver, thereby carries out correlation function, so receiver need not other hardware or software except the defined item of original CI specification.That is, even if AC-3CI module receiver of the present invention is not equipped with other hardware or software, the user also can listen to the AC-3 audio frequency by outer decoder.
By above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.Therefore, the technical scope of this invention can not be confined to the detailed description on the detailed book; Must determine its technical scope according to the scope of patent application.
Claims (4)
1, a kind of AC-3 generic interface modular device, it is characterized in that, the digital broadcast signal of the specific channel of demodulation, with the output of transportation streaming (TS) form, the digital broadcast receiver that separates decode video data and voice data from above-mentioned TS, be with by package ID (PID) in the middle of the TS of above-mentioned receiver output, the TS package that comprises the AC-3 voice data is filtered, and then extracts the filtration and the extraction unit of AC-3 voice data;
The PID of the TS package that is equivalent to comprise above-mentioned AC-3 voice data is provided in the control part of above-mentioned filtration and extraction unit;
Control by above-mentioned control part is able to switch and then from the TS data of above-mentioned receiver output, optionally outputs to filter and the switch portion of extraction unit; In addition the AC-3 voice data of exporting in the middle of above-mentioned filtration and the extraction unit is converted to the form that can extract to outside port, outputs to the AC-3CI module that the buffer of outside port is formed then, install in the mode of detaching at above-mentioned receiver.
According to the AC-3 generic interface modular device of claim 1, it is characterized in that 2, above-mentioned AC-3CI module-external port is connected with outer decoder, exporting to external loudspeaker by the AC-3 audio frequency of said external port output.
3, according to the AC-3 generic interface modular device of claim 1, it is characterized in that, above-mentioned control part makes its user select the outside output of AC-3 audio frequency by the menu of receiver, the user passes through menu item, according to the situation that selected AC-3 audio frequency is outwards exported, control the switch and the PID output of above-mentioned switch portion.
4, according to the AC-3 generic interface modular device of claim 1, it is characterized in that, above-mentioned control part is to analyze, to detect receiver the TS package PID that comprises AC-3 voice data in the program that the user listening to, and above-mentioned AC-3CI module sends the CA_PMT object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100527497A CN1722787A (en) | 2004-07-12 | 2004-07-12 | A C-3 common interface module apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2004100527497A CN1722787A (en) | 2004-07-12 | 2004-07-12 | A C-3 common interface module apparatus |
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| CN1722787A true CN1722787A (en) | 2006-01-18 |
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| CNA2004100527497A Pending CN1722787A (en) | 2004-07-12 | 2004-07-12 | A C-3 common interface module apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010072134A1 (en) * | 2008-12-22 | 2010-07-01 | Mediatek Inc. | Signal processing apparatuses capable of processing initially reproduced packets prior to buffering the initially reproduced packets |
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2004
- 2004-07-12 CN CNA2004100527497A patent/CN1722787A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010072134A1 (en) * | 2008-12-22 | 2010-07-01 | Mediatek Inc. | Signal processing apparatuses capable of processing initially reproduced packets prior to buffering the initially reproduced packets |
| US8321767B2 (en) | 2008-12-22 | 2012-11-27 | Mediatek Inc. | Packet processing apparatus and method capable of generating modified packets by modifying payloads of specific packets identified from received packets |
| US8902893B2 (en) | 2008-12-22 | 2014-12-02 | Mediatek Inc. | Packet processing apparatus and method capable of generating modified packets by modifying payloads of specific packets identified from received packets |
| US8910233B2 (en) | 2008-12-22 | 2014-12-09 | Mediatek Inc. | Signal processing apparatuses capable of processing initially reproduced packets prior to buffering the initially reproduced packets |
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