CN106851392A - Digital TV in high resolution interface - Google Patents
Digital TV in high resolution interface Download PDFInfo
- Publication number
- CN106851392A CN106851392A CN201510891346.XA CN201510891346A CN106851392A CN 106851392 A CN106851392 A CN 106851392A CN 201510891346 A CN201510891346 A CN 201510891346A CN 106851392 A CN106851392 A CN 106851392A
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- signal
- module
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- video
- wireless receiving
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- 238000000034 method Methods 0.000 claims abstract description 10
- 238000011084 recovery Methods 0.000 claims description 21
- 230000001360 synchronised effect Effects 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000000284 extract Substances 0.000 claims description 3
- 230000010354 integration Effects 0.000 abstract 1
- 230000002452 interceptive effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- 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 encoded video stream packets from an IP network
- H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
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- 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
- H04N21/439—Processing of audio elementary streams
- H04N21/4398—Processing of audio elementary streams involving reformatting operations of audio signals
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 digital TV in high resolution interface.The digital TV in high resolution interface includes wireless receiving module, signal processing module and Signal interface module.The wireless receiving module receives the radiofrequency signal for carrying audio frequency and video business.The radiofrequency signal that the signal processing module receives the wireless receiving module carries out TDS-OFDM demodulation, decoding and synchronization process, obtains audio-video signal, and export the audio-video signal.The Signal interface module receives the audio-video signal of the signal processing module output.Digital TV in high resolution interface of the invention can with high reliability receive and process radiofrequency signal to obtain high-quality audio-video signal, and device integration is high, small with convergence error, the short advantage of convergence time.
Description
Technical field
The present invention relates to digital TV technology, relate more specifically to a kind of digital TV in high resolution interface.
Background technology
Propose the scheme of a kind of T-DMB television system and its transmission currently for DMB-T, but the RF carrier wave that Transmission system is transmitted is received for user side, and audio-video signal, the more preferable solution of neither one are obtained to the treatment of RF carrier wave.
Now, because the display terminal resolution ratio of " high definition " digital television in T-DMB television system reaches 1920 × 1080 pixels, visual effect number, cost performance is high, therefore people constantly show growing trend to the demand of " high definition " digital television.However, for these reasons, current digital TV in high resolution there is also deficiency to RF carrier wave treatment audio-video signal aspect.Therefore, it is necessary to provide a kind of method that energy high reliability is received and processes high resolution audio and video access in the digital TV in high resolution interface and interactive digital television front end system of RF carrier wave.
The content of the invention
It is an object of the invention to provide a kind of digital TV in high resolution interface, energy high reliability is received and processes RF carrier wave so as to obtain high-quality audio-video signal.
To achieve these goals, the digital TV in high resolution interface that the present invention is provided includes wireless receiving module, signal processing module and Signal interface module.The wireless receiving module receives the radiofrequency signal for carrying audio frequency and video business.The radiofrequency signal that the signal processing module receives the wireless receiving module carries out TDS-OFDM demodulation, decoding and synchronization process, obtains audio-video signal, and export the audio-video signal.The Signal interface module receives the audio-video signal of the signal processing module output.
In one embodiment of the invention, the signal processing module includes demodulation module, decoder module and synchronous recovery module.The demodulation module carries out TDS-OFDM demodulation to the radiofrequency signal for carrying audio frequency and video business, obtains baseband signal.The decoder module is decoded to the baseband signal that the demodulation module is demodulated, and obtains the audio-video code stream.The synchronous recovery module is synchronized to the audio-video code stream of decoder module decoding output in time domain and/or frequency domain.
It is preferred that the demodulation module includes carrier recovery unit, TDS-OFDM demodulating units, channel estimating unit and synchronous recovery unit.The carrier recovery unit extracts the carrier signal for TDS-OFDM demodulation from the radiofrequency signal for carrying audio frequency and video business that the wireless receiving module is received.The TDS-OFDM demodulating units recover the radiofrequency signal of the carrier wave that obtains to receiving and are demodulated using the carrier recovery unit, obtain baseband signal.The radiofrequency signal that the channel estimating unit is received according to the wireless receiving module carries out channel estimation, so as to be compensated to the baseband signal that the TDS-OFDM demodulating units are demodulated.The synchronous recovery unit recovers the synchronizing information of the radiofrequency signal that the wireless receiving module is received.
By following description and with reference to accompanying drawing, the present invention will become more fully apparent, and these accompanying drawings are used to explain embodiments of the invention.
Brief description of the drawings
Fig. 1 is prior art physical channel frame structure schematic diagram.
Fig. 2 is prior art T-DMB television system block diagram.
Fig. 3 is the structured flowchart of digital TV in high resolution interface of the present invention.
Fig. 4 is the structured flowchart of the signal processing module of digital TV in high resolution interface shown in Fig. 3.
Fig. 5 is the flow chart of the method for high resolution audio and video access in interactive digital television front end system of the present invention.
Specific embodiment
With reference now to Description of Drawings embodiments of the invention, the element numbers being similar in accompanying drawing represent similar element.
With reference to Fig. 3, a kind of digital TV in high resolution interface of the present embodiment includes wireless receiving module 110, signal processing module 120 and Signal interface module 130.The wireless receiving module 110 receives the radiofrequency signal for carrying audio frequency and video business.The wireless receiving mould 110 includes antenna.The radiofrequency signal that the signal processing module 120 receives the wireless receiving module 110 carries out TDS-OFDM demodulation, decoding and synchronization process, obtains audio-video signal, and export the audio-video signal.The Signal interface module 130 receives the audio-video signal of the output of the signal processing module 120.
In detail, with reference to Fig. 4, the signal processing module 120 includes demodulation module 121, decoder module 122 and synchronous recovery module 123.The radiofrequency signal that audio frequency and video business is carried described in the demodulation module 121 pairs carries out TDS-OFDM demodulation, obtains baseband signal.The baseband signal that 122 pairs of demodulation modules 121 of the decoder module are demodulated is decoded, and obtains the audio-video code stream.The audio-video code stream of 123 pairs of decoding outputs of the decoder module 122 of the synchronous recovery module is synchronized in time domain and/or frequency domain.
The demodulation module 121 of the signal processing module 120 includes carrier recovery unit 121b, TDS-OFDM demodulating unit 121a, channel estimating unit 121c and synchronous recovery unit 121d.The carrier recovery unit 121b extracts the carrier signal for TDS-OFDM demodulation from the radiofrequency signal for carrying audio frequency and video business that the wireless receiving module 110 is received.The TDS-OFDM demodulating units 121a recovers the radiofrequency signal of the carrier wave that obtains to receiving and is demodulated using the carrier recovery unit 121b, obtains baseband signal.The radiofrequency signal that the channel estimating unit 121c is received according to the wireless receiving module 110 carries out channel estimation, so as to be compensated to the baseband signal that the TDS-OFDM demodulating units 121a is demodulated.The synchronous recovery unit 121d recovers the synchronizing information of the radiofrequency signal that the wireless receiving module 110 is received.
The decoder module 122 of the signal processing module 120 includes deinterleaving unit 122a and error correction decoding unit 122b.Baseband signal after the deinterleaving unit 122a is demodulated to the demodulation module 121 is deinterleaved conversion, and output transform data.The error correction decoding unit 122b is decoded using error correction decoding algorithm to the conversion data that the deinterleaving unit 122a is exported, and obtains audio-video signal.
With reference to Fig. 5, the method that high resolution audio and video is accessed in interactive digital television front end system of the invention comprises the following steps：（1）Reception carries the radiofrequency signal (step S1) of audio frequency and video business；（2）The carrier signal (step S2) for TDS-OFDM demodulation is extracted from the radiofrequency signal;（3）The radiofrequency signal for receiving is demodulated using the carrier wave, obtains baseband signal (step S3);（4）Channel estimation is carried out according to the radiofrequency signal, so as to be compensated (step S4) to the baseband signal;（5）The synchronizing information (step S5) of the radiofrequency signal received described in recovering；（6）Conversion, and output transform data (step S6) are deinterleaved to the baseband signal；（7）The conversion data are decoded using error correction decoding algorithm, obtains audio-video signal (step S7)；（8）The audio-video code stream is synchronized (step S8) in time domain or/and frequency domain；（9）The audio-video signal (step S9) is exported to terminal.
Above in association with most preferred embodiment, invention has been described, but the invention is not limited in embodiment disclosed above, and modification, equivalent combinations that various essence of the invention are carried out should be covered.
Claims (4)
1. a kind of digital TV in high resolution interface, including：Wireless receiving module, the wireless receiving module receives the radiofrequency signal for carrying audio frequency and video business；Signal processing module, the radiofrequency signal that the signal processing module receives the wireless receiving module carries out TDS-OFDM demodulation, decoding and synchronization process, obtains audio-video signal, and export the audio-video signal；And Signal interface module, the audio-video signal of the Signal interface module reception signal processing module output.
2. digital TV in high resolution interface as claimed in claim 1, it is characterised in that：The signal processing module includes：Demodulation module, the demodulation module carries out TDS-OFDM demodulation to the radiofrequency signal for carrying audio frequency and video business, obtains baseband signal；Decoder module, the decoder module is decoded to the baseband signal that the demodulation module is demodulated, and obtains the audio-video code stream；And synchronous recovery module, the synchronous recovery module synchronizes to the audio-video code stream of decoder module decoding output in time domain and/or frequency domain.
3. digital TV in high resolution interface as claimed in claim 2, it is characterised in that：The demodulation module includes：Carrier recovery unit, the carrier recovery unit extracts the carrier signal for TDS-OFDM demodulation from the radiofrequency signal for carrying audio frequency and video business that the wireless receiving module is received;TDS-OFDM demodulating units, the TDS-OFDM demodulating units recover the radiofrequency signal of the carrier wave that obtains to receiving and are demodulated using the carrier recovery unit, obtain baseband signal;Channel estimating unit, the radiofrequency signal that the channel estimating unit is received according to the wireless receiving module carries out channel estimation, so as to be compensated to the baseband signal that the TDS-OFDM demodulating units are demodulated;Synchronous recovery unit, the synchronous recovery unit recovers the synchronizing information of the radiofrequency signal that the wireless receiving module is received.
4. digital TV in high resolution interface as claimed in claim 2, it is characterised in that：The decoder module includes：Unit is deinterleaved, the baseband signal after the deinterleaving unit is demodulated to the demodulation module is deinterleaved conversion, and output transform data；And error correction decoding unit, the error correction decoding unit using error correction decoding algorithm to it is described deinterleaving unit export conversion data decode, obtain audio-video signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510891346.XA CN106851392A (en) | 2015-12-04 | 2015-12-04 | Digital TV in high resolution interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510891346.XA CN106851392A (en) | 2015-12-04 | 2015-12-04 | Digital TV in high resolution interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106851392A true CN106851392A (en) | 2017-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510891346.XA Pending CN106851392A (en) | 2015-12-04 | 2015-12-04 | Digital TV in high resolution interface |
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|---|---|
| CN (1) | CN106851392A (en) |
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2015
- 2015-12-04 CN CN201510891346.XA patent/CN106851392A/en active Pending
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Application publication date: 20170613 |