CN101742204A - Device for recording digital TV signal, method and TV thereof - Google Patents
Device for recording digital TV signal, method and TV thereof Download PDFInfo
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- CN101742204A CN101742204A CN200810217582A CN200810217582A CN101742204A CN 101742204 A CN101742204 A CN 101742204A CN 200810217582 A CN200810217582 A CN 200810217582A CN 200810217582 A CN200810217582 A CN 200810217582A CN 101742204 A CN101742204 A CN 101742204A
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Abstract
The invention is applicable to the technical field of a TV, and provided a device for recording digital TV signals, a method and a TV thereof. The device comprises a storage medium, a TV mainboard and a PVR module, wherein the PVR module comprises a USB controller and a multi-media codec chip, wherein the USB controller is used for coding TS stream so as to generate USB frame; and the multi-media codec chip is used for reading the USB frame generated by the USB controller, sending the USB frame into the storage medium, decoding and coding the USB frame generated by the USB controller and the USB frame read from the storage medium so as to generate multi-media signals, and sending the multi-media signals into an image/audio processor of the TV mainboard for decoding and outputting. The invention can realize recording and playing of the digital TV signals.
Description
Technical field
The invention belongs to TV technology, relate in particular to a kind of device, method and television set of recording digital television signal.
Background technology
At present, maturation along with digital television standard, Digital Television is becoming a kind of trend and trend gradually, the television set that receives and play digital TV broadcast signal is more and more, common way is: earlier with digital tuner receiving digital television broadcast signal, utilize digital demodulator signal to be demodulated to the TS stream of standard, give the broadcast of decoding of decoding master chip, simultaneously, in order to expand the amusement function of TV, increased on many television sets personal video record (Personal Video Recorder, PVR) module is to realize recording and time shift of TV signal, the PVR module reads Composite Video Broadcast Signal (the Composite Video Broadcast Signal on the main television mainboard, CVBS), giving master chip decodes, coding generates movable image (the Moving Picture Experts Group of expert group, MPEG) code stream, described code stream is encoded, generate the USB frame, described USB frame is stored in the storage medium by USB interface.Prior art can the record analog TV signal, such as the CVBS signal, but can not record digital television signal.
Summary of the invention
The object of the present invention is to provide a kind of device, method and television set of recording digital television signal, be intended to solve the problem that prior art can not be recorded digital television signal.
The present invention is achieved in that a kind of device of recording digital television signal, and described device comprises storage medium, TV SKD, PVR module, and described PVR module comprises:
The USB controller is used for TS stream is encoded, and generates the USB frame;
Multi-media codec chip, be used to read the USB frame of described USB controller generation and send it to described storage medium, and the USB frame that described USB controller is generated and the USB frame that reads from described storage medium decoded, encodes, generate multi-media signal, and send it image/audio process of described TV SKD to.
Described TV SKD comprises:
The numeral tuner is used for receiving digital television signal, and the described digital television signal that receives is carried out tuning, obtains intermediate-freuqncy signal;
The digital demodulation chip is used to receive the tuning intermediate-freuqncy signal that obtains of described digital tuner, and it is carried out analog/digital conversion, obtains digital signal, more described digital signal is carried out channel demodulation, obtains TS stream.
Another object of the present invention is to provide a kind of above-mentioned television set of recording the device of digital television signal that comprises.
Another object of the present invention is to provide a kind of method of recording digital television signal, described method comprises the steps:
The digital tuner receiving digital television signal of TV SKD;
Described digital tuner carries out tuning to the described digital television signal that receives, obtain intermediate-freuqncy signal;
The digital demodulation chip of USB module carries out analog/digital conversion to described intermediate-freuqncy signal, obtains digital signal;
Described digital demodulation chip carries out channel demodulation to described digital signal, obtains TS stream;
The USB controller of USB module is encoded to described TS stream, generates the USB frame;
The multi-media codec chip of USB module reads described USB frame and sends it to storage medium;
USB frame that the described multi-media codec chip that receives described storage medium transmits and storage.
Compared with prior art, in the present invention, numeral tuner receiving digital television signal, it is carried out the tuning intermediate-freuqncy signal that obtains, and the digital demodulation chip carries out analog/digital conversion and channel demodulation to described intermediate-freuqncy signal, obtains TS stream, the USB controller is encoded to TS stream, convert the USB frame to, read the USB frame and send it to storage medium by multi-media codec chip at last and store, can realize recording of digital television signal.
Description of drawings
Fig. 1 is the structural representation of the device of recording digital television signal that provides of the embodiment of the invention;
Fig. 2 is the realization flow figure of the method for recording digital television signal that provides of the embodiment of the invention.
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.
In embodiments of the present invention, numeral tuner receiving digital television signal, it is carried out the tuning intermediate-freuqncy signal that obtains, the digital demodulation chip carries out analog/digital conversion and channel demodulation to described intermediate-freuqncy signal, obtain TS stream, the USB controller is encoded to TS stream, converts the USB frame to, read the USB frame and send it to storage medium by multi-media codec chip at last and store, can realize recording of digital television signal.
Fig. 1 shows the structure of the device of recording digital television signal that the embodiment of the invention provides, and for convenience of explanation, only shows the relevant part of the embodiment of the invention.This device of recording digital television signal can be to be built in the unit that software unit, hardware cell or software and hardware in the television set combine.This digital television signal receives with the device of playing and comprises: display screen and loudspeaker 11, TV SKD 12, PVR module 13, storage medium 14.
Wherein TV SKD 12 comprises microcontroller 121, image/audio process 122, digital tuner 123, digital demodulation chip 124; PVR module 13 comprises USB controller 131, multi-media codec chip 132.
Be positioned at digital tuner 123 on the TV SKD 12 under the control of microcontroller 121, receiving digital television signal, and according to the channel of user's appointment, carry out tuning to the described digital television signal that receives, obtain intermediate-freuqncy signal, send it to digital demodulation chip 124, digital demodulation chip 124 carries out analog/digital conversion to described intermediate-freuqncy signal earlier, obtain digital signal, again described digital signal is carried out channel demodulation, obtain TS stream, send it to the USB controller 131 of PVR module 13, USB controller 131 reads described TS stream, and it is encoded, the USB frame of generation standard, send to the multimedia decoding chip 132 of PVR module 13, multi-media codec chip 132 reads described USB frame, described USB frame is divided into two-way, one the tunnel decodes, coding, generate multi-media signal, sending the image/audio process 122 that is positioned on the TV SKD 12 to decodes and playing digital television signal, another road directly is sent to storage medium 14 with the form of USB frame, be stored in the storage medium 14, when needs are play the digital television program of recording, multi-media codec chip 132 reads the USB frame of storage in the storage medium 14, it is decoded, coding generates multi-media signal, and wherein said multi-media signal comprises audio signal and vision signal, as one embodiment of the present of invention, described vision signal is the YPbPr signal that generates through coding.Multi-media codec chip 132 sends described multi-media signal to the image/audio process 122 that is positioned at TV SKD 12, image/audio process 122 is under the control of microcontroller 121, the YPbPr signal decoding of described multi-media signal is reduced into the imaging of RGB tricolor signal, and audio signal and RGB tricolor signal carried out synchronously, display video signal on the display screen 11 of television set, audio output apparatus by television set, such as loudspeaker 11 output audio signals, realize the broadcast of digital television program.
Fig. 2 shows the realization flow of the method for recording digital television signal that the embodiment of the invention provides, and details are as follows:
In step S201, the digital tuner of TV SKD under the control of microcontroller, receiving digital television signal.
In step S202, described digital tuner carries out tuning to the digital television signal that receives, obtain intermediate-freuqncy signal.
The numeral tuner is under the control of microcontroller, and according to the channel of user's appointment, the digital television signal that digital tuner is received carries out tuning, obtains intermediate-freuqncy signal, and sends it to the digital demodulation chip and carry out channel-decoding.
In step S203, the digital demodulation chip of TV SKD carries out analog/digital conversion to the intermediate-freuqncy signal of the tuning gained of digital tuner, obtains digital signal.
In step S204, the digital demodulation chip carries out channel demodulation to described digital signal, (the USB controller that sends to the PVR module is encoded for Moving Picture Experts Group Two, the MPEG2) TS of coding stream to obtain meeting second generation movable image expert group.
In step S205, the USB controller of PVR module is encoded to TS stream, generates the USB frame.
By the USB controller on the PVR module TS stream that the digital demodulation chip carries out the channel-decoding gained is encoded, generate the USB frame that meets the USB standard.
In step S206, the multi-media codec chip of PVR module reads the USB frame and sends it to storage medium.
Multi-media codec chip reads the USB frame of USB controller transmission and sends it to storage medium, as a preferred embodiment of the present invention, multi-media codec chip reads described USB frame, and described USB frame is divided into two-way, one the tunnel decodes, encodes, generate multi-media signal, send the image/audio process that is positioned on the TV SKD to and decode and play, another road directly is sent to storage medium with the form of USB frame and stores.
The detailed process that multi-media codec chip is decoded, encoded the USB frame is as follows: the multi-media codec chip of PVR module reads the USB frame, decode, read out audio signal and vision signal, described encoding video signal is generated the YPbPr signal send image/audio process to and decode and export to display screen and loudspeaker are play, can realize the broadcast of digital television program.
Image/audio process is decoded to multi-media signal and to export to the detailed process that display screen and loudspeaker play as follows: image/audio process is under the control of microcontroller, YPbPr signal decoding in the multi-media signal is generated the imaging of RGB tricolor signal, and audio signal and RGB tricolor signal carried out synchronously, display video signal on the television display screen curtain, pass through audio output apparatus, such as the loudspeaker output audio signal, realize the broadcast of digital television program.
In step S207, storage medium receives USB frame and the storage that multi-media codec chip transmits.
As one embodiment of the present of invention, storage medium receives USB frame and the storage that multi-media codec chip transmits by USB interface, as a preferred embodiment of the present invention, the multi-media codec chip of PVR module reads the USB frame from storage medium, decode, read out audio signal and vision signal, described encoding video signal is generated image/audio process that the YPbPr signal sends TV SKD to decode and export to display screen and loudspeaker are play, can realize the broadcast of digital television program.
One of ordinary skill in the art will appreciate that, realize that all or part of step in the foregoing description method is to finish by the relevant hardware of program command, described program can be in being stored in a computer read/write memory medium, described storage medium is as ROM/RAM, disk, CD etc.
In embodiments of the present invention, numeral tuner receiving digital television signal, it is carried out the tuning intermediate-freuqncy signal that obtains, the digital demodulation chip carries out analog/digital conversion and channel demodulation to described intermediate-freuqncy signal, obtain TS stream, the USB controller is encoded to TS stream, converts the USB frame to, read the USB frame and send it to storage medium by multi-media codec chip at last and store, can realize recording of digital television signal.Multi-media codec chip can read the USB frame and decodes, encodes from storage medium in addition, generates multi-media signal, plays described multi-media signal by image/audio process then, realizes the broadcast of the digital television signal recorded.
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 device of recording digital television signal comprises storage medium, TV SKD, PVR module, it is characterized in that, described PVR module comprises:
The USB controller is used for TS stream is encoded, and generates the USB frame;
Multi-media codec chip, be used to read the USB frame of described USB controller generation and send it to described storage medium, and the USB frame that described USB controller is generated and the USB frame that reads from described storage medium decoded, encodes, generate multi-media signal, and its image/audio process that sends described TV SKD to decoded and export.
2. device as claimed in claim 1 is characterized in that, described TV SKD comprises:
The numeral tuner is used for receiving digital television signal, and the described digital television signal that receives is carried out tuning, obtains intermediate-freuqncy signal;
The digital demodulation chip is used to receive the tuning intermediate-freuqncy signal that obtains of described digital tuner, and it is carried out analog/digital conversion, obtains digital signal, more described digital signal is carried out channel demodulation, obtains TS stream.
Microcontroller is used to control described digital tuner receiving digital television signal, and the described digital television signal that receives is carried out tuning, obtains intermediate-freuqncy signal and control chart picture/audio process and multi-media signal is decoded and exports;
Image/audio process is used for multi-media signal is decoded and exported.
3. device as claimed in claim 1 or 2 is characterized in that, described multi-media signal is audio signal and vision signal.
4. device as claimed in claim 3 is characterized in that, described vision signal is the YPbPr signal.
5. one kind comprises claim 1 or the 2 described television sets of recording the device of digital television signal.
6. a method of recording digital television signal is characterized in that, described method comprises the steps:
The digital tuner receiving digital television signal of TV SKD;
Described digital tuner carries out tuning to the described digital television signal that receives, obtain intermediate-freuqncy signal;
The digital demodulation chip of USB module carries out analog/digital conversion to described intermediate-freuqncy signal, obtains digital signal;
Described digital demodulation chip carries out channel demodulation to described digital signal, obtains TS stream;
The USB controller of USB module is encoded to described TS stream, generates the USB frame;
The multi-media codec chip of USB module reads described USB frame and sends it to storage medium;
USB frame that the described multi-media codec chip that receives described storage medium transmits and storage.
7. method as claimed in claim 6 is characterized in that described method also comprises the steps:
The multi-media codec chip of USB module reads the USB frame from storage medium, it is decoded, encodes, and generates multi-media signal, and sends it image/audio process of TV SKD to;
Image/the audio process of TV SKD is decoded to described multi-media signal and is exported.
8. method as claimed in claim 6 is characterized in that described method also comprises the steps:
The multi-media codec chip of USB module reads the USB frame of the USB controller generation of USB module, and it is decoded, encodes, and generates multi-media signal, and sends it image/audio process of TV SKD to.
9. as claim 7 or 8 described methods, it is characterized in that described multi-media signal is audio signal and vision signal.
10. method as claimed in claim 9 is characterized in that, described vision signal is the YPbPr signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810217582A CN101742204A (en) | 2008-11-10 | 2008-11-10 | Device for recording digital TV signal, method and TV thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810217582A CN101742204A (en) | 2008-11-10 | 2008-11-10 | Device for recording digital TV signal, method and TV thereof |
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| CN101742204A true CN101742204A (en) | 2010-06-16 |
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| CN200810217582A Pending CN101742204A (en) | 2008-11-10 | 2008-11-10 | Device for recording digital TV signal, method and TV thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106792116A (en) * | 2016-12-15 | 2017-05-31 | 深圳Tcl数字技术有限公司 | Stream-recording playing device, system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106792116A (en) * | 2016-12-15 | 2017-05-31 | 深圳Tcl数字技术有限公司 | Stream-recording playing device, system and method |
| CN106792116B (en) * | 2016-12-15 | 2020-07-31 | 深圳Tcl数字技术有限公司 | Code stream recording and playing device, system and method |
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Application publication date: 20100616 |