CN102710933B - DTV coding and decoding device and DTV decoding method - Google Patents
DTV coding and decoding device and DTV decoding method Download PDFInfo
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Abstract
The invention provides a kind of DTV coding and decoding device, comprising: digit tuner, for receiving from outside radiofrequency signal and exporting two-way digital medium-frequency signal; The first demodulator, receives a wherein railway digital intermediate-freuqncy signal of digit tuner output and carries out demodulation, output the first code stream; The first decoder, decodes to the first code stream, output the first digital program stream; The second demodulator, receives another railway digital intermediate-freuqncy signal of digit tuner output and carries out demodulation, output the second code stream; The second decoder, decodes to second code stream, output the second digital program stream. The invention allows for another kind of DTV coding and decoding device and two kinds of DTV decoding methods. By the present invention, can realize the TV signal of same signal source is decoded and exported two-way digital television signal, and will be wherein a railway digital TV signal be pushed to external equipment and show, thereby make user can watch the digital television program of two different channels simultaneously.
Description
Technical field
The present invention relates to video coding and decoding technology field, in particular to DTV coding and decoding device and numeral electricityDepending on decoding method.
Background technology
In TV technology, existing biography screen technology has two kinds: single mode passes screen and multimode passes screen. Single mode passes containing of screenJustice refers to and can only " see what what passes ", content and the complete phase of the content that is pushed to other equipment that the machine is playWith; And multimode passes the implication of screen for can " seeing that a set of biography is a set of ", the content that the machine is play and be pushed to other and establishStandby content difference. But it also has limitation, can only realize at present and " watch the content of a signal source, pushThe content of another signal source ", for example watch TV in the machine, push AV to other equipment, not to realize at thisMachine is watched the program of a digital TV channel, pushes the program of another one digital TV channel to other equipment.
At present general DTV code encoding/decoding mode is referring to Fig. 1.
This DTV coding and decoding device 100 comprises following part: digit tuner (Tuner) 102, demodulator104, decoder 106.
Wherein, digit tuner 102 receives extraneous radiofrequency signal, exports a railway digital intermediate frequency (IF) after tuningSignal; This digital medium-frequency signal is input to demodulator 104, output transport stream (TS) after demodulator 104 demodulation;This MPTS is input to decoder 106, after decoder 106 decodings, exports namely single channel of single program streamProgram, as CCTV1. This program stream can directly be play on local television screen; Also meanwhile,Encoded device is encoded into the specific format code stream of (as H.264) again, and is pushed to other smart machines and showsShow. But under present circumstances, can only realize " single mode pass screen ", the content that main frame shows be pushed to that slave shows inHold identically, or the content in unlike signal source is shown respectively.
Therefore, need a kind of new video coding and decoding technology, can be same to the two-way digital television signal of same signal sourceShi Jinhang decoding, and wherein a road program stream is pushed to external equipment, thus make user can watch two not simultaneouslyCo-channel (adjective) digital television program.
Summary of the invention
Consider above-mentioned background technology, an object of the present invention is to provide a kind of new DTV encoding and decoding technique,Can obtain two-way digital program stream simultaneously.
In view of this, the invention provides a kind of DTV coding and decoding device, comprising: digit tuner, for connecingReceive from outside radiofrequency signal and export two-way digital medium-frequency signal; The first demodulator, is connected to described digital high frequencyHead, receives a wherein railway digital intermediate-freuqncy signal of described digit tuner output and carries out demodulation, output the first code stream;The first decoder, is connected to described the first demodulator, described the first code stream decoded, and output the first digital programStream; The second demodulator, is connected to described digit tuner, receives in another railway digital of described digit tuner outputFrequency signal also carries out demodulation, output the second code stream; The second decoder, is connected to described the second demodulator, to describedTwo code streams are decoded, output the second digital program stream.
In this technical scheme, obtain two-way MPTS (the first code stream and the second code stream), two by two demodulatorsThrough decoder, decoding obtains the different program stream of two-way to road MPTS respectively again. Here the different program of two-way obtainingStream is drawn by same signal source, can be the TV programme signal of different channel, for example cctv1 and cctv2.
The present invention also provides a kind of DTV coding and decoding device, comprising: digit tuner, for receive from outsideThe radiofrequency signal of portion is also exported a railway digital intermediate-freuqncy signal; Demodulator, is connected to described digit tuner, to described oneRailway digital intermediate-freuqncy signal is carried out demodulation, output code flow; The first decoder, is connected to described demodulator, from described code streamIn decode the first digital program stream; The second decoder, is connected to described demodulator, decodes from described code streamTwo digital program streams.
In this technical scheme, because each frequency in current digital television signal can integrated multiple digital TV channels,The MPTS that therefore demodulator demodulation can be obtained is decoded respectively, can obtain the different program stream of two-way. ThisIn the different program stream of two-way that obtains drawn by same signal source, can be the TV programme signal of different channel,For example cctv1 and cctv2.
Brief description of the drawings
Fig. 1 is DTV code encoding/decoding mode schematic diagram in correlation technique;
Fig. 2 is DTV coding and decoding device schematic diagram according to an embodiment of the invention;
Fig. 3 is DTV coding and decoding device schematic diagram according to still another embodiment of the invention;
Fig. 4 is DTV decoding method schematic diagram according to an embodiment of the invention;
Fig. 5 is DTV decoding method schematic diagram according to still another embodiment of the invention;
Fig. 6 has used DTV encoding and decoding technique according to the present invention to watch the schematic diagram of video frequency program.
Detailed description of the invention
In order more clearly to understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with accompanying drawing and concrete realThe mode of executing is further described in detail the present invention.
Set forth in the following description a lot of details so that fully understand the present invention, still, the present invention also canImplement to adopt other to be different from other modes described here, therefore, below protection scope of the present invention is not subject toThe restriction of disclosed specific embodiment.
Below in conjunction with drawings and Examples, the present invention will be further described. It should be noted that the situation of not conflictingUnder, the feature in the application's embodiment and embodiment can combine mutually.
First, please refer to Fig. 2, Fig. 2 is showing of DTV coding and decoding device according to an embodiment of the inventionIntention. As shown in Figure 2, DTV coding and decoding device 200 can comprise according to an embodiment of the invention: numeralTuner 202, for receiving from outside radiofrequency signal and exporting two-way digital medium-frequency signal; The first demodulator204, be connected to this digit tuner 202, the wherein railway digital intermediate-freuqncy signal that reception digit tuner 202 is exported is alsoCarry out demodulation, output the first code stream; The first decoder 206, is connected to the first demodulator 204, and the first code stream is enteredRow decoding, output the first digital program stream; The second demodulator 208, is connected to digit tuner 202, receives numeralAnother railway digital intermediate-freuqncy signal of tuner output is also carried out demodulation, output the second code stream; The second decoder 210, connectsBe connected to the second demodulator 208, second code stream is decoded, output the second digital program stream.
In this technical scheme, obtain two-way MPTS (the first code stream and the second code stream), two by two demodulatorsThrough decoder, decoding obtains the different program stream of two-way to road MPTS respectively again. Here the different program of two-way obtainingStream is drawn by same signal source, can be the TV programme signal of different channel, for example cctv1 and cctv2.
In technique scheme, preferably, also comprise: encoder 212, be connected to the first decoder 206, according toPredetermined format is encoded to the first digital program stream, obtains third yard stream; Communication unit 214, sends out third yard streamDeliver to external equipment, to show the first digital program.
By this technical scheme, can use external equipment (portable formula terminal such as such as panel computer, mobile phone etc.) to broadcastPut the programme signal obtaining through digital TV decoding, and can play the channel different from the machine play content, realizePlay two different TV programme simultaneously. Here be to be easy to by wired or wireless to external equipment transmitted streamCommunication mode transmission, and the form of external equipment support broadcasting.
In above-mentioned arbitrary technical scheme, preferably, communication unit 214 comprise following one of at least: Bluetooth communication mouldPiece, infrared communication module, RF communication module, usb communication module, serial communication modular and WIFI communication module.
In this technical scheme, communication unit can use outside wired and/or wireless communication mode is sent to programme signalPortion's equipment, exists multiple wired and communication available, and this technical scheme can be used wherein a kind of or severalKind. Using under normal circumstances more is WIFI communication module, uses the WIFI communication technology can carry out easily nothingLine transmission, and the terminal of present stage use WIFI communication module is comparatively general, can make technical scheme of the present inventionRange of application is wider.
In above-mentioned arbitrary technical scheme, preferably, also comprise: display 216, be connected to the second decoder 210,Show the second digital program according to the second digital program stream.
In this technical scheme, DTV coding and decoding device 200 can be play a railway digital wherein by TV itselfProgramme signal, can play the different digital program of playing from external equipment.
At this, those skilled in the art should be appreciated that, decoder can be three or more, can be from codeIn stream, obtain three roads or multi-path digital program stream more, three railway digital program streams are play respectively, just can realize threeNumber byte object is watched simultaneously.
Please refer to Fig. 3 below, Fig. 3 is DTV coding and decoding device signal according to still another embodiment of the inventionFigure.
As shown in Figure 3, DTV coding and decoding device 300 according to still another embodiment of the invention can comprise: numberWord tuner 302, for receiving from outside radiofrequency signal and exporting a railway digital intermediate-freuqncy signal; Demodulator304, be connected to this digit tuner 302, a railway digital intermediate-freuqncy signal is carried out to demodulation, output code flow; The first decodingDevice 306, is connected to this demodulator 304, decodes the first digital program stream from code stream; The second decoder 308, connectsBe connected to demodulator 304, from code stream, decode the second digital program stream.
In this technical scheme, because each frequency in current digital television signal can integrated multiple digital TV channels,The MPTS that therefore demodulator 304 demodulation can be obtained is decoded respectively, can obtain the different program of two-wayStream. Here the different program stream of two-way obtaining is drawn by same signal source, can be the TV programme of different channelSignal, for example cctv1 and cctv2.
In technique scheme, preferably, also comprise: encoder 310, be connected to the first decoder 306, according toPredetermined format is encoded to the first digital program stream, obtains third yard stream; Communication unit 312, sends out third yard streamDeliver to external equipment, to show the first digital program.
By this technical scheme, can use external equipment (portable formula terminal such as such as panel computer, mobile phone etc.) to broadcastPut the programme signal obtaining through digital TV decoding, and can play the channel different from the machine play content, realizePlay two different TV programme simultaneously. Here be to be easy to by wired or wireless to external equipment transmitted streamCommunication mode transmission, and the form of external equipment support broadcasting.
In above-mentioned arbitrary technical scheme, preferably, communication unit 312 comprise following one of at least: Bluetooth communication mouldPiece, infrared communication module, RF communication module, usb communication module, serial communication modular and WIFI communication module.
In this technical scheme, communication unit can use outside wired and/or wireless communication mode is sent to programme signalPortion's equipment, exists multiple wired and communication available, and this technical scheme can be used wherein a kind of or severalKind. Using under normal circumstances more is WIFI communication module, uses the WIFI communication technology can carry out easily nothingLine transmission, and the terminal of present stage use WIFI communication module is comparatively general, can make technical scheme of the present inventionRange of application is wider.
In above-mentioned arbitrary technical scheme, preferably, can also comprise: display 314, is connected to the second decoder308, show the second digital program according to the second digital program stream.
In this technical scheme, DTV coding and decoding device can be play wherein Yi road program letter by TV itselfNumber, can play the different program of playing from external equipment.
Please refer to Fig. 4 below, Fig. 4 is DTV decoding method schematic diagram according to an embodiment of the invention.
As shown in Figure 4, DTV decoding method comprises the following steps according to an embodiment of the invention: step402, receive from outside radiofrequency signal and export two-way digital medium-frequency signal; Step 404, respectively to two railway digitalsIntermediate-freuqncy signal is carried out demodulation, exports respectively the first code stream and the second code stream; Step 406, respectively to the first code stream andTwo code streams are decoded, and export respectively the first digital program stream and the second digital program stream.
In this technical scheme, respectively two-way digital medium-frequency signal is carried out to demodulation and obtain two-way MPTS, two-way transmissionStream obtains the different program stream of two-way through decoding respectively again. Here the different program stream of the two-way that obtains is by same letterNumber source draws, can be the TV programme signal of different channel, for example cctv1 and cctv2.
In technique scheme, preferably, further comprising the steps of: according to predetermined format to the first digital program streamEncode and the third yard stream obtaining is sent to external equipment, to show the first digital program.
By this technical scheme, can use external equipment (portable formula terminal such as such as panel computer, mobile phone etc.) to broadcastPut the programme signal obtaining through digital TV decoding, and can play the channel different from the machine play content, realizePlay two different TV programme simultaneously. Here be to be easy to by wired or wireless to external equipment transmitted streamCommunication mode transmission, and the form of external equipment support broadcasting.
In above-mentioned arbitrary technical scheme, preferably, adopt Bluetooth communication, infrared communication, radio communication, USB to lead toThird yard stream is sent to external equipment by letter, serial communication or WIFI communication mode.
In this technical scheme, can use wired and/or wireless communication mode that programme signal is sent to external equipment,Exist multiple wired and communication available, this technical scheme can be used wherein one or more. ConventionallyIn situation, using more is WIFI communication, uses the WIFI communication technology can carry out easily wireless transmission, andPresent stage is used the terminal of WIFI communication module comparatively general, can make technical scheme range of application of the present invention moreExtensively.
In above-mentioned arbitrary technical scheme, preferably, further comprising the steps of: according to the second digital program stream in this localityShow the second digital program.
In this technical scheme, DTV coding and decoding device can be play wherein Yi road program letter by TV itselfNumber, can play the different program of playing from external equipment.
Fig. 5 is DTV decoding method schematic diagram according to still another embodiment of the invention.
As shown in Figure 5, DTV decoding method according to still another embodiment of the invention comprises the following steps: stepRapid 502, receive from outside radiofrequency signal and export a railway digital intermediate-freuqncy signal; Step 504, to a railway digitalIntermediate-freuqncy signal is carried out demodulation, output code flow; Step 506, decodes to code stream, obtain the first digital program stream andThe second digital program stream.
In this technical scheme, because each frequency in current digital television signal can integrated multiple digital TV channels,The MPTS that therefore demodulation can be obtained is decoded respectively, can obtain the different program stream of two-way. Here obtainThe different program stream of two-way drawn by same signal source, can be the TV programme signal of different channel, for exampleCctv1 and cctv2.
In technique scheme, preferably, further comprising the steps of: according to predetermined format to the first digital program streamEncode and the third yard stream obtaining is sent to external equipment, to show the first digital program.
By this technical scheme, can use external equipment to play through the digital television programme signal obtaining of decoding, andAnd can play the channel different from the content of televising, realize and play two different TV programme simultaneously. HereBe to be easy to transmit by wired or wireless communication mode to external equipment transmitted stream, and external equipment support is playForm.
In above-mentioned arbitrary technical scheme, preferably, adopt Bluetooth communication, infrared communication, radio communication, USB to lead toThird yard stream is sent to external equipment by letter, serial communication or WIFI communication mode.
In this technical scheme, can use wired and/or wireless communication mode that programme signal is sent to external equipment,Exist multiple wired and communication available, this technical scheme can be used wherein one or more. ConventionallyIn situation, using more is WIFI communication, uses the WIFI communication technology can carry out easily wireless transmission, andPresent stage is used the terminal of WIFI communication module comparatively general, can make technical scheme range of application of the present invention moreExtensively.
In above-mentioned arbitrary technical scheme, preferably, further comprising the steps of: according to the second digital program stream in this localityShow the second digital program.
In this technical scheme, DTV coding and decoding device can be play wherein Yi road program letter by TV itselfNumber, can play the different program of playing from external equipment.
In order further to understand the present invention, please refer to Fig. 6 below, Fig. 6 has used according to DTV of the present inventionEncoding and decoding technique is watched the schematic diagram of video frequency program.
As shown in Figure 6, television set 604 comprises DTV coding and decoding device according to an embodiment of the invention. OnePlant this DTV coding and decoding device in detailed description of the invention and there is function and structure as shown in Figure 2, at another kind of toolIn body embodiment, this DTV coding and decoding device has function and structure as shown in Figure 3.
Digital television radio-frequency signal inputs to television set 604 by external cable 602, and in the numeral of television set 604In TV coding and decoding device, (there is function and knot as shown in Figure 2 at DTV coding and decoding device through following processingIn the situation of structure):
First through having the digit tuner of Double-number intermediate frequency output, output two-way digital intermediate frequency is exported; Two railway digitalsIntermediate-freuqncy signal is inputted respectively two demodulators, obtains the different MPTS of two-way through two demodulators; Two-way is differentMPTS obtains two different program streams, the i.e. program of two different channels through two decoders respectively; Wherein oneRoad program stream is play after being sent to the display module of television set 604 this locality on the screen of television set 604, in Fig. 6Visible, the machine is just being play cctv1; Another road program stream process encoder encodes generation is easy to transmission and external equipment canWith the code stream of playing, for example H.264 form in this embodiment, then with communication transmission, for example, existsThe WIFI communication using in this embodiment; Panel computer 606 is communicated by letter and is received this another road program stream then by WIFIOn screen, play, as shown in Figure 6, on panel computer 606, play cctv2. Thus, realized sameThe TV signal of individual digital television signal source is decoded respectively, and watches two channels under external equipment auxiliary simultaneouslyTV programme.
In addition, in current digital television signal, each frequency can integrated multiple digital TV channels, for example: green grass or young cropsThe digital television program that island broadcasting and TV are broadcast, 474MHz frequency has comprised 7 cover digital television programs, is respectivelyCCTV1, CCTV2, CCTV7, CCTV10, CCTV11, CCTV12, CCTV-music. So just canAdopt a kind of code encoding/decoding mode of simplification, same realization " watched the program of a digital TV channel, pushed same frequencyThe program of another one digital TV channel " technique effect.
First through thering is the digit tuner of single digital intermediate frequency, after tuning, export a railway digital intermediate-freuqncy signal; ShouldA demodulator of digital medium-frequency signal input, obtains a road MPTS; This road MPTS obtains through two decoders respectivelyTo two different program streams, the i.e. program of two different digital television channels; Wherein a road program stream is sent to TVAfter the display module of machine 604 this locality, on the screen of television set 604, play, as seen from Figure 6, the machine is just playCctv1; Through encoder encodes, generation is easy to the code stream transmitting and external equipment can be play to another road program stream, for exampleH.264 form in this embodiment, then with communication transmission, for example, uses in this embodimentWIFI communication; Panel computer 606 is communicated by letter and is received that then this another road program stream play on screen by WIFI, asVisible in Fig. 6, on panel computer 606, play cctv2.
Thus, realize the TV signal of same digital television signal source has been decoded respectively, and at external equipmentThe TV programme of simultaneously watching two digital channels under auxiliary. And this decoder can be according to user's demand selective decompressionGo out required digital television program.
To sum up, according to technical scheme of the present invention, can carry out the two-way digital television signal of same signal source simultaneouslyDecoding, and wherein a road is pushed to external equipment, thus make user can watch two different digital TVs frequently simultaneouslyThe TV programme in road.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for the technology people of this areaMember, the present invention can have various modifications and variations. Within the spirit and principles in the present invention all, that does is anyRevise, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. a DTV coding and decoding device, is characterized in that, comprising:
Digit tuner, for receiving from outside radiofrequency signal and exporting a railway digital intermediate-freuqncy signal;
Demodulator, is connected to described digit tuner, and a described railway digital intermediate-freuqncy signal is carried out to demodulation, output code flow;
The first decoder, is connected to described demodulator, decodes the first digital program stream from described code stream;
The second decoder, is connected to described demodulator, decodes the second digital program stream from described code stream; And
Encoder, is connected to described the first decoder, according to predetermined format, described the first digital program stream is encoded, and obtains third yard stream;
Communication unit, is sent to external equipment by described third yard stream, to show the first digital program.
2. DTV coding and decoding device according to claim 1, is characterized in that, described communication unit comprise following one of at least:
Bluetooth communication, infrared communication module, RF communication module, usb communication module, serial communication modular and WIFI communication module.
3. according to the DTV coding and decoding device described in any one in claim 1 or 2, it is characterized in that, also comprise:
Display, is connected to described the second decoder, shows the second digital program according to described the second digital program stream.
4. a DTV decoding method, is characterized in that, comprises the following steps:
Receive from outside radiofrequency signal and export a railway digital intermediate-freuqncy signal;
A described railway digital intermediate-freuqncy signal is carried out to demodulation, output code flow;
Described code stream is decoded, obtain the first digital program stream and the second digital program stream; And
According to predetermined format, described the first digital program stream is encoded and the third yard stream obtaining is sent to external equipment, to show the first digital program.
5. DTV decoding method according to claim 4, is characterized in that, adopts Bluetooth communication, infrared communication, radio communication, usb communication, serial communication or WIFI communication mode that described third yard stream is sent to described external equipment.
6. according to the DTV decoding method described in claim 4 or middle any one, it is characterized in that, further comprising the steps of:
Show the second digital program in this locality according to described the second digital program stream.
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| CN103873901B (en) * | 2012-12-13 | 2019-01-15 | 联想(北京)有限公司 | Signal processing method, electronic equipment and mobile electronic device |
| CN104618792A (en) * | 2013-11-04 | 2015-05-13 | 珠海扬智电子科技有限公司 | Streaming method and streaming system thereof |
| CN103929673A (en) * | 2014-04-30 | 2014-07-16 | 广州视源电子科技股份有限公司 | System and method for pushing smart television voice to mobile terminal |
| CN106358066A (en) * | 2015-07-13 | 2017-01-25 | 阿里巴巴集团控股有限公司 | Television signal playing method and device |
| CN106792033A (en) * | 2015-11-20 | 2017-05-31 | 天津三星电子有限公司 | One kind plays performance system and method |
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Address after: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee after: Hisense Video Technology Co.,Ltd. Address before: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee before: HISENSE ELECTRIC Co.,Ltd. |
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