CN1312931C - Method of image signal transmission for wireless network - Google Patents
Method of image signal transmission for wireless network Download PDFInfo
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- CN1312931C CN1312931C CNB2003101235218A CN200310123521A CN1312931C CN 1312931 C CN1312931 C CN 1312931C CN B2003101235218 A CNB2003101235218 A CN B2003101235218A CN 200310123521 A CN200310123521 A CN 200310123521A CN 1312931 C CN1312931 C CN 1312931C
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Abstract
The present invention provides a signal transmission method for a wireless network system. The wireless network system comprises a receiver terminal for receiving many video data. The signal transmission method comprises the following steps that (a) whether a first header in many video data is received by the receiver terminal; (b), after the step (a) is carried out, if the receiver terminal does not receive the first header, a default header is selected by the receiver terminal to be used as the first header.
Description
Technical field
The present invention relates to a kind of image signal transmission method that is used for wireless network, he is particularly related to a kind of use one acquiescence title and default frame data, when data can't receive or transmit interruption, continue to finish the image signal transmission method of translator and image demonstration for a receiving terminal.
Background technology
The scope of radio network technique can be from global voice and data network (can allow use and set up remote wireless online) to optimized infrared ray and radio frequency technology (can be used for short-range wireless online).Use the general device of wireless network to comprise portable computer, desktop PC, hand-held computer, PDA(Personal Digital Assistant), mobile phone, hand-written pen-type computer and calling set etc.Because popularizing of wireless technology, the user who moves can use their mobile phone to come the access Email, and the passenger of operation portable computer can connect the internet by the main platform that is installed in airport, railway station and other public place.As user at home the time, the hardware unit that can also wireless mode connects on the desktop comes deal with data and transmits file to the elsewhere.
Wireless network type is as fixed network, can wireless network be divided into different types according to the distance that data can be passed on, comprise radio wide area network (WWAN), wireless metropolitan area net (WMAN), WLAN (WLAN), and wireless personal network (WPAN).No matter under which kind of framework, this framework of transmission system is all similar, sees also Fig. 1, and Fig. 1 has shown the basic transmission architecture of a Radio Network System, also is the schematic diagram of a wireless transmitter 10 (Wireless Tranceiver).Wireless transmitter 10 has comprised a transmission end (Transmitter, TX) 12, one receiving terminal (Receiver, RX) 14, transmission end 12 and receiving terminal 14 each a self-contained transmission end antenna 13 and receiving terminal antennas 15.Transmission end antenna 13 can be passed through with signal and data in transmission end 12, be sent to receiving terminal 14 via a specific wireless network (is a WLAN as present embodiment), do follow-up processing by 15 receptions of receiving terminal antenna and by receiving terminal 14 internal circuits, wherein, the content that transmits accounted for the less sound of data volume (Audio) signal before the several years, evolution is to now in conjunction with the multimedia real time information of sound, dynamic image signal even interactive interface.Even to this day, the most current standard is motion picture expert group MPEG on the dynamic image handling, this is that MPEG (Motion Picture Experts Group motion picture expert group) work group in 1988 sets up and the optional network specific digit video of popularization and the standard compression form of audio frequency, and nowadays these compressed formats have been widely used in the making of global digitized content product.
Please continue to consult Fig. 1, receiving terminal 14 comprises a decoder (Decoder) 16 in addition, is used for a plurality of image datas are deciphered.The image data that meets Motion Picture Expert Group MPEG with transmission is a main embodiment, when receiving terminal 14 beginning (from the transmission end 12) when receiving compressed one first frame data (FirstFrame Data), decoder 16 can be by seeking relevant title (Header) in the data that receive, as the foundation that decompresses.Generally speaking, the image data that is transmitted can comprise the heading file data of one first frame, to form the image transmission signals of bit stream form.Include bit preamble (Preamble) data, frame in the heading file and open a beginning position (SFD, Start Frame Delimiter) data etc., can be for the source of decoder 16 recognition data transmission, information such as frame sign, frame resolution (Resolution), dependent quantization (Quantization) coefficient, extremely important for finishing of decoded operation, if in the way of transfer of data, lost these information, then can make decoder 16 that the situation of decoding error takes place.Yet, because factors such as the degree of integration between communication bandwidth deficiency, the not good or various wireless networks of communication quality is not good, the wireless communication ability now that makes still is not enough to guarantee fully complete errorless the finishing of data transmissions, can't provide the action user correctly effectively to carry out radio communication to support the transfer of data of real-time dynamic video.
Summary of the invention
Therefore main purpose of the present invention is a kind of image signal transmission method that an acquiescence title and default frame data are provided in advance, to address the above problem.
In an embodiment of the present invention, we propose a kind of method for transmitting signals that is used for a Radio Network System, be mainly used to transmit image data, and these a little image data formats comprise novel motion picture expert group compression standard MPEG-1, MPEG-2, MPEG-4 specification and other video code model.In order to ensure in transfer of data and decoded operation, the decoder of receiving terminal can determine relevant heading file data smoothly to decipher, corresponding transmission end can be attempted repeating to broadcast one and be comprised the heading message package of heading file information, and first title of an acquiescence title as first frame data that receive is provided in receiving terminal in advance.In addition, receiving terminal is also prepared first frame that default frame data (Default Frame Data) receive as decoder in advance.When the image data bust this, default heading file and default frame data then can allow receiving terminal keep running, and make that the receiving terminal with the technology of the present invention feature can be opened in the way of data is transmitted in the transmission end, and the anxiety of free of data leakage.
Purpose of the present invention is for providing a kind of method for transmitting signals that is used for a Radio Network System, this Radio Network System comprises a receiving terminal (Receiver), be used for receiving a plurality of image datas, this method for transmitting signals includes: (a) use this receiving terminal to judge whether to receive one first title (First Header) in these a plurality of image datas; And (b) after carrying out step (a),, use this receiving terminal to select an acquiescence title (Default Header), as this first title if this receiving terminal does not receive this first title.
Another object of the present invention is for providing a kind of method for transmitting signals that is used for a Radio Network System, this Radio Network System comprises a receiving terminal (Receiver), be used for receiving a plurality of image datas, this method for transmitting signals includes: (a) use this receiving terminal to judge whether to receive one first frame data (First Frame Data) in these a plurality of image datas; And (b) after carrying out step (a),, use default frame data (Default Frame Data) as these first frame data if this receiving terminal does not receive this first frame data.
The accompanying drawing summary
Fig. 1 is the schematic diagram of a wireless transmitter, and has shown the basic transmission architecture of a Radio Network System.
Fig. 2 is the flow chart of the present invention one method embodiment.
Fig. 3 is the flow chart of Fig. 1 other method embodiment.
Fig. 4 is the flow chart of other method embodiment of the present invention.
Fig. 5 is the flow chart of a detailed method embodiment of the present invention.
The reference numeral explanation
10 wireless transmitters, 1 transmission end
14 receiving terminals, 16 decoders
Embodiment
Method and technology feature of the present invention is to lay a foundation in the framework of the Radio Network System of Fig. 1 and wireless transmitter 10 (comprise transmission end 12, receiving terminal 14, and decoder 16), and the image data that is transmitted meets novel motion picture expert group compression standard (MPEG), JPEG and other video code model.Major technology feature of the present invention can be divided into two aspects: use an acquiescence title and use default frame data.Talk from the utilization of acquiescence title earlier, see also Fig. 2, Fig. 2 is the flow chart of the present invention one method embodiment.Method for transmitting signals is in the present embodiment mainly set out by the viewpoint of the receiving terminal in Fig. 1 Radio Network System 14, step when describe receiving a plurality of image data, and each image data that is transmitted can be considered a video package (Video Packet), wherein can comprise at least one heading file data, with receiving terminal 14, the image data that receives continuously promptly can be considered the signal of video signal of bit stream form.Ask for an interview Fig. 2:
Step 100: the decoder 16 of the receiving terminal 14 of initialization Fig. 1, to prepare to receive the video package (image data) that sends by transmission end 12;
Step 102: when receiving terminal 14 begins to receive compressed one first frame data (First FrameData), the decoder 16 of receiving terminal 14 can be by seeking relevant one first title (First Header) in the data that receive, as the foundation that decompresses, if search first title of first frame data, then carry out step 106, if do not search first title of first frame data, then carry out step 104.Generally speaking, the information that first heading file includes can be for the source of decoder 16 recognition data transmission, frame sign, frame resolution, dependent quantization coefficient information such as (can be generally called Profile).
Step 104: do not receive first title if the decoder of receiving terminal 14 16 is judged, then receiving terminal 14 can determine an acquiescence title (Default Header), as the usefulness of this first title, and carry out step 106.
Step 106: if receiving terminal 14 receives first title, proceed directly to this step by step 102, then decoder 16 is deciphered a plurality of image datas of this bit stream form according to the first received title; If proceed to this step by step 104, then decoder 16 is the acquiescence titles that determine according to by receiving terminal 14, and a plurality of image datas that bit is streamed are deciphered.
Please note, in the present invention, decoder 16 in order to ensure receiving terminal 14 in transfer of data and decode operation can determine relevant heading file data smoothly to decipher, corresponding transmission end 12 can be attempted repeating to broadcast one and be comprised the heading message package (HeaderInformation Packet) of related heading fileinfo to receiving terminal 14, and wherein the content of title package signal is to be a pure words character string, shared transmission bandwidth is very little, can allow transmission end 12 broadcast this heading message package at set intervals repeatedly, and when in receiving terminal 14 is failed by the data that receive, finding first title, receiving terminal 14 can be according to the content of this heading message package that receives in addition, by selecting the acquiescence title of being desired in preprepared a plurality of titles.As from the foregoing, before the step 104 of carrying out the foregoing description, need store a plurality of titles in advance for you to choose in the receiving terminal 14, after receiving terminal 14 receives the heading message package, receiving terminal 14 can determine the acquiescence title according to the content of heading message package, avoids can't deciphering or wrong decoding because of the leakage of first title of first frame data.See also Fig. 3, Fig. 3 is the flow chart of Fig. 2 other method embodiment, lays a foundation in the technical characterictic of Fig. 2, and other includes the following step:
Step 101: after carry out step 100, use the transmission end 12 of Fig. 1 to broadcast a heading message package at set intervals repeatedly to receiving terminal 14.
Step 103: when carrying out step 102, when the decoder 16 of receiving terminal 14 judge in by the data that receive search out the first relevant title after, the decoder 16 of receiving terminal 14 can be ignored the heading message package that (Neglect) transmission end 12 is broadcast at set intervals, and carry out step 106.
Step 105: before carry out step 104, reach when carrying out step 104, if judging, the decoder of receiving terminal 14 16 do not receive first title, then receiving terminal 14 can be by in a plurality of titles that store in advance, the heading message package that sends according to transmission end 12 determines the acquiescence title, as the usefulness of this first title, and carry out step 106.
In fact, pick out in a plurality of titles that acquiescence title described in the invention can be stored in advance by receiving terminal 14, that is receiving terminal 14 can store a plurality of titles in advance.This acquiescence title can be an employed title in the preceding decoded operation, even, can come out as acquiescence title of the present invention by selecting one in all used titles in the preceding repeatedly decoded operation.As from the foregoing, the decision mechanism of no matter giving tacit consent to title why, as long as, all be contained in the technical characterictic of the present invention about using the acquiescence title to replace first heading file that do not finish receiving technology as the decoding foundation.
Next, see also Fig. 4 about the utilization of default frame data (Default Frame Data), Fig. 4 is the flow chart of other method embodiment of the present invention, and operating procedure is as follows:
Step 200: the decoder 16 of initiating 14, to prepare to receive the video package (image data) that sends by transmission end 12;
Step 202: receiving terminal 14 begins to receive one first compressed frame, and receiving terminal 14 can confirm whether to receive the first complete frame data, if acknowledge receipt of first frame data, then carry out step 204, if do not receive first frame data, then carry out step 206.
Step 204: the decoder 16 of receiving terminal 14 carries out decoded operation, shows first frame.
Step 206: receiving terminal 14 can require transmission end 12 related data that retransfers, if retransfer successfully, then carry out step 204, if the failure that retransfers (as above a default delivery time (Time-Out) or to reach the highest number that retransfers) then carry out step 208.
Step 208: use receiving terminal 14 that one (decompression is in advance finished) default frame data show and should preset frame, and these default frame data are to be stored in advance in the receiving terminal 14 as these first frame data.
Note that Fig. 4 embodiment can merge with Fig. 2 and Fig. 3 embodiment, become the complete technical characterictic of the present invention, ask for an interview Fig. 5, Fig. 5 is the flow chart of a detailed method embodiment of the present invention, and the operating procedure of description is as follows:
Step 300: the decoder 16 of initiating 14, to prepare to receive the video package (image data) that sends by transmission end 12;
Step 302: receiving terminal 14 begins to receive one first compressed frame, and receiving terminal 14 can confirm whether to receive the first complete frame data, if acknowledge receipt of first frame data, then carry out step 304, if do not receive first frame data, then carry out step 310.
Step 304: when receiving terminal 14 begins to receive first frame, the decoder 16 of receiving terminal 14 can be simultaneously by seeking relevant first title (First Header) in the data that receive, as the foundation that decompresses, if search first title of first frame data, then carry out step 308, if do not search first title of first frame data, then carry out step 306.
Step 306: do not receive first title if the decoder of receiving terminal 14 16 is judged, then receiving terminal 14 can determine an acquiescence title, as the usefulness of first title, and carry out step 308.During actual enforcement, a heading message package can be broadcast at set intervals to receiving terminal 14 in transmission end 12, judge when the decoder 16 of receiving terminal 14 and not receive first title, then receiving terminal 14 can be by in a plurality of titles that store in advance, the heading message package that sends according to transmission end 12 determines this acquiescence title, as the usefulness of first title.
Step 308: if receiving terminal 14 determines to receive first title, promptly proceed directly to this step by step 304, the decoder 16 of receiving terminal 14 can be ignored the heading message package that broadcast transmission end 12, and a plurality of image datas of this bit stream form are carried out decoded operation according to received first title, decipher and demonstrate first frame; If proceed to this step by step 306, then decoder 16 is the default heading files that determine according to by receiving terminal 14, decodes and shows first frame.
Step 310: receiving terminal 14 can require transmission end 12 relevant first frame data that retransfer, if retransfer successfully, then carry out step 304, if the failure that retransfers (as above a default delivery time (Time-Out) or to reach the highest number that retransfers) then carry out step 312.
Step 312: use receiving terminal 14 that one (decompression is in advance finished) default frame data show and should preset frame, and these default frame data are to be stored in advance in the receiving terminal 14 as these first frame data.
Generally speaking, in the process of wireless transmission, complete information must be received as the decoder 16 of the receiving terminal 14 of Fig. 1 and just decoded operation can be carried out, so, receiving terminal 14 needs than transmission end 12 Zao coming into operation, to prepare to receive data, and utilization of the present invention is prepared the default frame of one (decoding is in advance finished) in advance as first frame in receiving terminal, make receiving terminal need not to come into operation, and can in the way of data is transmitted in the transmission end, be opened again than the transmission end is early with the technology of the present invention feature.In addition, the present invention provides an acquiescence title as first title that receives again in receiving terminal in advance, in case of need, make and have the wireless transmitter of the technology of the present invention feature under abominable network environment, when the image data bust this, the design of default heading file and default frame data then can allow receiving terminal keep normally decoding running smoothly and frame shows.
The above only is preferred embodiment of the present invention, and all equalizations of being done according to the present patent application claim change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (17)
1. method for transmitting signals that is used for a Radio Network System, this Radio Network System comprises a receiving terminal, is used for receiving a plurality of image datas, and this method for transmitting signals includes:
(a) use this receiving terminal to judge whether to receive one first title in these a plurality of image datas; And
(b) after carrying out step (a),, use this receiving terminal to select an acquiescence title, as this first title if this receiving terminal does not receive this first title.
2. method for transmitting signals as claimed in claim 1, wherein, this Radio Network System comprises a transmission end in addition, and this receiving terminal stores a plurality of heading files, and this method for transmitting signals includes in addition:
(c) use this transmission end to broadcast a heading message package to this receiving terminal; And
(d) in step (b), this receiving terminal is the content according to this heading message package, by selecting this acquiescence title in these a plurality of titles.
3. method for transmitting signals as claimed in claim 2, wherein, the content of this title package signal is to be a pure words character string, this transmission end is to broadcast this heading message package at set intervals repeatedly to this receiving terminal.
4. method for transmitting signals as claimed in claim 1, wherein, this receiving terminal comprises a decoder, and this method for transmitting signals includes in addition:
(e) after carrying out step (a), if this receiving terminal receives this first title, this decoder is deciphered these a plurality of image datas according to this first title; And
(f) after carrying out step (b), this decoder is deciphered these a plurality of image datas according to this acquiescence title.
5. method for transmitting signals as claimed in claim 1, wherein, this acquiescence title be for one last time the operation in an employed title.
6. method for transmitting signals as claimed in claim 1, described step (a) comprises:
(g) use this receiving terminal to judge whether to receive one first frame data in these a plurality of image datas; And
(h) after carrying out step (g),, use default frame data as these first frame data if this receiving terminal does not receive this first frame data.
7. method for transmitting signals as claimed in claim 1, wherein, these a plurality of image datas are the specifications that meet a novel Motion Picture Experts Group and JPEG.
8. method for transmitting signals as claimed in claim 1, wherein, this Radio Network System is to be a wireless personal network, a WLAN or a radio wide area network.
9. method for transmitting signals that is used for a Radio Network System, this Radio Network System comprises a receiving terminal, is used for receiving a plurality of image datas, and this method for transmitting signals includes:
(a) use this receiving terminal to judge whether to receive one first frame data in these a plurality of image datas; And
(b) after carrying out step (a),, use to be preset in the also decoded default frame data of this receiving terminal as these first frame data if this receiving terminal does not receive this first frame data.
10. method for transmitting signals as claimed in claim 9, wherein, these default frame data are to be stored in advance in this receiving terminal.
11. method for transmitting signals as claimed in claim 9, it includes in addition:
(c) use this receiving terminal to judge whether from these default frame data, to obtain one first title; And
(d) after carrying out step (c),, use this receiving terminal to select an acquiescence title, as this first title if this receiving terminal does not receive this first title.
12. method for transmitting signals as claimed in claim 11, wherein, this receiving terminal comprises a decoder, and this method for transmitting signals includes in addition:
(e) after carrying out step (c), if this receiving terminal receives this first title, this decoder is deciphered these a plurality of image datas according to this first title; And
(f) after carrying out step (d), this decoder is deciphered these a plurality of image datas according to this acquiescence title.
13. method for transmitting signals as claimed in claim 11, wherein, this Radio Network System comprises a transmission end in addition, and this receiving terminal stores a plurality of heading files, and this method for transmitting signals includes in addition:
(g) use this transmission end to broadcast a heading message package to this receiving terminal; And
(h) in step (d), this receiving terminal is the content according to this heading message package, by selecting this acquiescence title in these a plurality of titles.
14. method for transmitting signals as claimed in claim 13, wherein, the content of this title package signal be a pure words character string, this transmission end broadcast this heading message package at set intervals repeatedly to this receiving terminal.
15. method for transmitting signals as claimed in claim 11, wherein, this acquiescence title be for one last time the operation in an employed title.
16. method for transmitting signals as claimed in claim 9, wherein, these a plurality of image datas meet the specification of a novel Motion Picture Experts Group and JPEG.
17. method for transmitting signals as claimed in claim 9, wherein, this Radio Network System is to be a wireless personal network, a WLAN or a radio wide area network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101235218A CN1312931C (en) | 2003-12-24 | 2003-12-24 | Method of image signal transmission for wireless network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101235218A CN1312931C (en) | 2003-12-24 | 2003-12-24 | Method of image signal transmission for wireless network |
Publications (2)
| Publication Number | Publication Date |
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| CN1633179A CN1633179A (en) | 2005-06-29 |
| CN1312931C true CN1312931C (en) | 2007-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2003101235218A Expired - Fee Related CN1312931C (en) | 2003-12-24 | 2003-12-24 | Method of image signal transmission for wireless network |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105809750A (en) * | 2014-12-29 | 2016-07-27 | 中国移动通信集团公司 | ETC charging method, device and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08289247A (en) * | 1995-04-10 | 1996-11-01 | Matsushita Electric Ind Co Ltd | Digital signal recording and reproducing device |
| WO2002007325A1 (en) * | 2000-07-17 | 2002-01-24 | Koninklijke Philips Electronics N.V. | Signal coding |
| CN1360762A (en) * | 2000-03-29 | 2002-07-24 | 三星电子株式会社 | Method and apparatus for transmitting and receiving wireless packet |
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2003
- 2003-12-24 CN CNB2003101235218A patent/CN1312931C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08289247A (en) * | 1995-04-10 | 1996-11-01 | Matsushita Electric Ind Co Ltd | Digital signal recording and reproducing device |
| CN1360762A (en) * | 2000-03-29 | 2002-07-24 | 三星电子株式会社 | Method and apparatus for transmitting and receiving wireless packet |
| WO2002007325A1 (en) * | 2000-07-17 | 2002-01-24 | Koninklijke Philips Electronics N.V. | Signal coding |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105809750A (en) * | 2014-12-29 | 2016-07-27 | 中国移动通信集团公司 | ETC charging method, device and system |
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| CN1633179A (en) | 2005-06-29 |
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