CN102186031A - Digital television signal processing chip system and television - Google Patents
Digital television signal processing chip system and television Download PDFInfo
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- CN102186031A CN102186031A CN 201110118210 CN201110118210A CN102186031A CN 102186031 A CN102186031 A CN 102186031A CN 201110118210 CN201110118210 CN 201110118210 CN 201110118210 A CN201110118210 A CN 201110118210A CN 102186031 A CN102186031 A CN 102186031A
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Abstract
The invention is applied in the technical field of television, and provides a digital television signal processing chip system and the television. The system comprises a digital television signal modulation unit, a digital television signal decoding unit and an audio and video signal processing unit. The digital television signal processing chip system and the television receive a decoded audio and video signal by the audio and video signal processing unit from the digital television signal decoding unit, directly perform audio and video effect processing on the audio and video signal, and output the processed audio and video signal so as to solve the problem of relatively higher signal loss and relatively higher system cost caused by requirements on the D/A or A/D format conversion of the signal before the output of a digital television signal in the prior art, and further reduce the signal loss and system construction cost.
Description
Technical field
The invention belongs to technical field of television sets, relate in particular to a kind of digital television signal process chip system and television set.
Background technology
At present, the digital high-definition television that we mentioned is meant that some passage of television set can receive high-definition signal, for example, HDMI (High Definition Multimedia Interface) (HDMI) passage can receive the signal of 1080I 50hz, and perhaps video aberration (YUV) passage receives the signal of 1080P 50hz etc.Along with starting broadcasting of wired high-definition signal, the problem of TV station's transmitting terminal solves, the mode that the user is used by high definition set-top box module and digital high-definition television module, reach the purpose of watching the high definition program, yet this mode is before exporting the different-format high-definition signal that sends from each TV station of China that receives, must carry out D/A form or A/D format conversion earlier, for example, must be YUV signal through the D/A format conversion earlier, again YUV signal is converted to the digital high-definition signal or YUV signal is converted to the high-definition signal that HDMI receives through A/D, and must use the high-definition signal line to be connected between this set-top box module and the television set module, make loss of signal bigger, the system constructing cost is higher.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of digital television signal process chip system and television set, being intended to solve prior art is carrying out in the processing procedure high-definition signal, must be with the conversion of high-definition signal through D/A or A/D form, cause with loss of signal bigger, system constructing cost problem of higher.
The embodiment of the invention is achieved in that a kind of digital television signal process chip system, and described system comprises:
Digital television signal system unit is used for the Digital Television high-frequency signal that receives is modulated, the digital television signal after the output modulation;
The digital television signal decoding unit is used to receive the digital television signal after the modulation, and the digital television signal after the described modulation is carried out decoding processing, obtains decoded audio-video signal; And
The audio-video signal processing unit is used to receive decoded audio-video signal, and described audio-video signal is directly carried out exporting after the audio frequency and video effect process.
Another purpose of the embodiment of the invention is to provide a kind of television set that comprises above-mentioned digital television signal process chip system.
The embodiment of the invention receives the decoded audio-video signal of exporting from the digital television signal decoding unit by the audio-video signal processing unit, and this audio-video signal directly carried out exporting after the audio frequency and video effect process, solved prior art before digital television signal is exported, must be with of the conversion of this signal through D/A or A/D form, cause that loss of signal is big, the system cost problem of higher, make loss of signal and system constructing cost be reduced.
Description of drawings
Fig. 1 is the structure chart of the digital television signal process chip system that provides of first embodiment of the invention;
Fig. 2 is the structure chart of the audio-video signal processing unit that provides of second 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.
The embodiment of the invention receives the decoded audio-video signal of exporting from the digital television signal decoding unit by the audio-video signal processing unit, and this audio-video signal directly carried out exporting after the audio frequency and video effect process, make loss of signal and system constructing cost be reduced.
The embodiment of the invention provides a kind of digital television signal process chip system, and described system comprises:
Digital television signal system unit is used for the Digital Television high-frequency signal that receives is modulated, the digital television signal after the output modulation;
The digital television signal decoding unit is used to receive the digital television signal after the modulation, and the digital television signal after the described modulation is carried out decoding processing, obtains decoded audio-video signal; And
The audio-video signal processing unit is used to receive decoded audio-video signal, and described audio-video signal is directly carried out exporting after the audio frequency and video effect process.
The embodiment of the invention also provides a kind of television set that comprises above-mentioned digital television signal process chip system.
The embodiment of the invention is modulated the digital television signal that receives by digital television signal system unit, digital television signal after the output modulation, the digital television signal decoding unit carries out decoding processing to the digital television signal after modulating, audio-video signal behind the output decoder, the audio-video signal processing unit directly carries out exporting after the audio frequency and video effect process to decoded audio-video signal, thereby has reduced loss of signal and system constructing cost.
Below in conjunction with specific embodiment specific implementation of the present invention is described in detail:
Embodiment one:
Fig. 1 shows the structure of the digital television signal process chip system that first embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention.
Digital television signal system unit 11 is used for the Digital Television high-frequency signal that receives is modulated, the digital television signal after the output modulation.
In embodiments of the present invention, the Digital Television high-frequency signal is the digital television signal of high-definition format.Digital television signal system unit 11 specifically comprise tuner unit 111 and in put unit 112, be specially:
In put unit 112 and be used to receive this Digital Television intermediate-freuqncy signal, and this intermediate-freuqncy signal is amplified modulation, the digital television signal after the output modulation.
Wherein, tuner unit 111 is the digital signal tuner, as the receiving digital television high-frequency signal, and select a needed channel, and the high-frequency signal of this channel is reduced on the fixed frequency signal, this fixed frequency signal is exactly an intermediate-freuqncy signal, in specific implementation process, the function that the digital signal tuner is put unit 112 in also can comprising, thereby as a television tuner unit module independently.
Digital television signal decoding unit 12 is used to receive the digital television signal after the modulation, and this digital television signal is carried out decoding processing, obtains decoded audio-video signal.
Digital television signal decoding unit 12 specifically comprises digital signal decrypting device 121 and audio-video signal decoding unit 122, is specially:
Digital signal decrypting device 121 receives the digital television signal after the modulation, and this digital television signal is carried out demodulation and decryption processing, obtains the digital television signal after the deciphering; And
Digital television signal behind audio-video signal decoding unit 122 receiving and decipherings, and this digital television signal is carried out digital decoding handle the audio-video signal behind the output decoder.
In embodiments of the present invention, digital signal decrypting device 121 is come out the digital television signal demodulation after modulating, the signal major part that demodulation is come out is 64 quadrature amplitude modulation (QAM), also have 256QAM's, and the signal that claims this demodulation to come out is a TS stream, at this time restore MPEG-2 or signal H.264 through demultiplexing again, signal name is decided according to the TV station of various places, solved the signal of 720P signal or 1080I again by audio-video signal decoding unit 122, this signal name is decided according to the TV station of various places.
Audio-video signal processing unit 13 is used to receive decoded audio-video signal, and this audio-video signal is directly carried out exporting after the audio frequency and video effect process.
In embodiments of the present invention, digital television signal process chip system also comprises the smart card reading unit, the differentiation that is used for the TV programme that receives is decrypted is handled, for example, difference according to the user location, production firm by TV rations to user's respective smart cards when selling, and the TV with this high-definition signal processing unit possesses one or several expansion slots, as long as plug the smart card that to decipher digital television program, and the IC-card of authenticating user identification, just can directly watch Digital Television.
In embodiments of the present invention, this digital television signal process chip system can be used for television set, can be used as also independently that suspension member is integrated in the system for TV set, wherein, digital television signal decoding unit 12 is integrated on the ALL-HD single-chip with audio-video signal decoding unit 13.
The embodiment of the invention is by being integrated in digital television signal decoding unit and the audio-video signal decoding unit on the ALL-HD single-chip, the Digital Television high-frequency signal that receives is carried out demodulation, demultiplexing and decoding processing, show this signal until output, whole process does not all relate to D/A or A/D format conversion, and signal transmission passage is a digital channel, this chip system can be accomplished lower conversion of signals loss, and with respect to whole system for TV set, do not need to use set-top box, also just used the HDMI line of a junctor top box and TV end less, the remote controller of a set-top box, reduce the system constructing cost greatly, the user also need not to switch between the remote controller of the remote controller of set-top box and TV.
Embodiment two:
Fig. 2 shows the structure chart of the audio-video signal processing unit that second embodiment of the invention provides, and for convenience of explanation, only shows the part relevant with the embodiment of the invention.
Audio-video signal processing unit 13 specifically comprises audio signal processing unit 131 and video signal processing unit 132, wherein:
Audio signal processing unit 131 is used to receive decoded audio signal, this decoded audio signal is directly carried out audio handle back output.
In embodiments of the present invention, audio signal processing unit 131 is handled the audio signal of decoded 720P signal or 1080I by the audio of audio frequency processing system (SRS) after, for example, high pitch, bass, balance, surrounding sound effect are handled, through the power amplifier amplifying signal, be output to loud speaker and sound.
Video signal processing unit 132 is used to receive decoded vision signal, and this decoded vision signal directly is converted to the signal consistent with the television set resolution format of display, and exports the signal after this conversion.
In embodiments of the present invention, the resolution format of display of television set can be known in advance, if the high-definition signal form of 1080P, then video signal processing unit 132 receives decoded vision signal, obtain the form of this vision signal, this vision signal is converted to signal with the 1080P form.In specific implementation process, if the form of decoded vision signal is 1080I, then this signal is done interlacing (Deinterlace) and handle, obtain the signal of 1080P; If be the signal format of 720P, then because line number is not enough, must take to insert the mode of row, be that the Scaler mode is handled, obtain the signal of 1080P, then the signal of the 1080P that obtains being carried out the enhancement process of image quality, is the conversion of signals after handling that the form of Low Voltage Differential Signal (LVDS) is delivered on the HDTV display screen of 1080P and shown at last.
In embodiments of the present invention, the television set high-definition signal is transferred on the display screen that is presented at TV from TV station, whole channel transfer all be signal digital, high definition, owing to do not relate to A/D or D/A conversion, so loss of signal is lower in the whole signals transmission, can perfectly show high-definition signal, reduce the system constructing cost, user-friendly.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to finish by the relevant hardware of program control, described program can be stored in the computer read/write memory medium, described storage medium is as ROM/RAM, disk, CD etc.
The embodiment of the invention is modulated the Digital Television high-frequency signal that receives by digital television signal system unit, digital television signal after the output modulation, the digital television signal decoding unit carries out decoding processing to the digital television signal after modulating, audio-video signal behind the output decoder, the audio-video signal processing unit is to decoded audio-video signal, and this audio-video signal directly carried out exporting after the audio frequency and video effect process, solved since prior art before digital television signal is exported, must be with of the conversion of this signal through D/A or A/D form, cause loss of signal bigger, the system cost problem of higher, thus loss of signal and system constructing cost reduced.
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. digital television signal process chip system is characterized in that described system comprises:
Digital television signal system unit is used for the Digital Television high-frequency signal that receives is modulated, the digital television signal after the output modulation;
The digital television signal decoding unit is used to receive the digital television signal after the modulation, and the digital television signal after the described modulation is carried out decoding processing, obtains decoded audio-video signal; And
The audio-video signal processing unit is used to receive decoded audio-video signal, and described audio-video signal is directly carried out exporting after the audio frequency and video effect process.
2. the system as claimed in claim 1 is characterized in that, described digital television signal decoding unit and audio-video signal processing unit are integrated on the single-chip ALL-HD.
3. the system as claimed in claim 1 is characterized in that, described Digital Television high-frequency signal is the digital television signal of high-definition format.
4. the system as claimed in claim 1 is characterized in that, described digital television signal system unit specifically comprises:
The tuner unit is used for the receiving digital television high-frequency signal, and the line frequency road selection of going forward side by side, high-frequency signal amplify and frequency-conversion processing, output Digital Television intermediate-freuqncy signal; And
In put the unit, be used to receive described Digital Television intermediate-freuqncy signal, and described intermediate-freuqncy signal amplified modulation, the digital television signal after the output modulation.
5. system as claimed in claim 4 is characterized in that, described tuner unit is the digital signal tuner.
6. the system as claimed in claim 1 is characterized in that, described digital television signal decoding unit specifically comprises:
The digital signal decrypting device is used to receive the digital television signal after the modulation, and described digital television signal is carried out demodulation and decryption processing, obtains the digital television signal after the deciphering; And
The audio-video signal decoding unit is used for the digital television signal behind the receiving and deciphering, and described digital television signal is carried out digital decoding handle the audio-video signal behind the output decoder.
7. the system as claimed in claim 1 is characterized in that, described audio-video signal processing unit specifically comprises:
Audio signal processing unit is used to receive decoded audio signal, described decoded audio signal is directly carried out audio handle back output; And
Video signal processing unit is used to receive described decoded vision signal, and described decoded vision signal is converted to the signal consistent with the television set resolution format of display, and exports the signal after the described conversion.
8. the system as claimed in claim 1 is characterized in that, described television set resolution format of display is the high definition resolution format of display.
9. the system as claimed in claim 1 is characterized in that, described system also comprises the smart card reading unit, and the differentiation that is used for the TV programme that receives is decrypted is handled.
10. a television set is characterized in that, described television set comprises each described digital television signal process chip system of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110118210 CN102186031A (en) | 2011-05-09 | 2011-05-09 | Digital television signal processing chip system and television |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110118210 CN102186031A (en) | 2011-05-09 | 2011-05-09 | Digital television signal processing chip system and television |
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| CN102186031A true CN102186031A (en) | 2011-09-14 |
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| CN 201110118210 Pending CN102186031A (en) | 2011-05-09 | 2011-05-09 | Digital television signal processing chip system and television |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1949837A (en) * | 2006-06-07 | 2007-04-18 | 深圳创维－Rgb电子有限公司 | Television sot |
| CN1964441A (en) * | 2006-12-06 | 2007-05-16 | 北京中星微电子有限公司 | TV receiving system |
| CN201571146U (en) * | 2009-11-27 | 2010-09-01 | 深圳市同洲电子股份有限公司 | Broadcast/television signal processing system and broadcast/television signal player |
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2011
- 2011-05-09 CN CN 201110118210 patent/CN102186031A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1949837A (en) * | 2006-06-07 | 2007-04-18 | 深圳创维－Rgb电子有限公司 | Television sot |
| CN1964441A (en) * | 2006-12-06 | 2007-05-16 | 北京中星微电子有限公司 | TV receiving system |
| CN201571146U (en) * | 2009-11-27 | 2010-09-01 | 深圳市同洲电子股份有限公司 | Broadcast/television signal processing system and broadcast/television signal player |
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Application publication date: 20110914 |