CN101814969A - Method and system for reducing bit stream and electronic device - Google Patents
Method and system for reducing bit stream and electronic device Download PDFInfo
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- CN101814969A CN101814969A CN200910007768A CN200910007768A CN101814969A CN 101814969 A CN101814969 A CN 101814969A CN 200910007768 A CN200910007768 A CN 200910007768A CN 200910007768 A CN200910007768 A CN 200910007768A CN 101814969 A CN101814969 A CN 101814969A
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Abstract
The invention relates to a method and system for reducing bit stream and an electronic device. The method of the invention uses network to transmit multimedia data from a transmission end to a receiving end, wherein the multimedia data contain a first group of pictures. The method for reducing bit stream comprises the following steps: obtaining transmission condition data; decoding the first group of pictures, converting to first color code; converting the first color code to second color code according to the transmission condition data; and converting the second color code to a second group of pictures. By using the method, the transmission end can transmit data meeting transmission conditions and the second group of pictures of which bit stream is reduced, to the receiving end; and document transmission can be performed according to the transmission condition data, thus reducing the load of the server and saving network resources.
Description
Technical field
The present invention relates to a kind of method of bit stream, the system and electronic installation of reduction bit stream of reducing, particularly a kind ofly connect transmitting terminal and receiving terminal in point-to-point mode and obtain the transmission conditions data and receiving terminal ability to play restriction by network, transmitting terminal is according to transmission conditions data and receiving terminal ability to play data, and dynamic compression or encoded multimedia data are to the method for the reduction bit stream of receiving terminal, the system and the electronic installation of reduction bit stream.
Background technology
Along with the fast development of digital technology, the various multimedia file formats of various electronic products (such as personal digital assistant, set-top box, mobile phone or personal computer or the like) also produce thereupon.So be subject to the bandwidth of diverse network, for example about 3.5Mbps of download capabilities and 24Mbps on the best of ADSL (Asymmetric Digital Subscriber Line), about 27Mbps of download capabilities and 38Mbps on the best in CABLE broadband, about 5Mbps of download capabilities and 100Mbps on the best of optical fiber (Optical Fiber), the all about 70Mbps of download capabilities on the best of WiMAX (Worldwide Interoperability for Microwave Access), about 43Kbps of download capabilities and 64Kbps on the best of GPRS (General Packet Radio Service), the about 384Kbps of best download capabilities of 3G (3rd-generation), or 3.5G (HSDPA, High-Speed Downlink Packet Access) the about 14.4Mbps of best download capabilities etc., therefore when the transmitting multimedia file, different the making of network environment because of transmission end and receiving terminal may be taken place transmit and receive asynchronous or the network environment of receiving terminal is slower, cause receiving terminal to receive the problems such as serious delay of multimedia file.
Employed multimedia file format is not quite similar by (such as avi file, wmv file, mpeg file, mov file or 3gp file etc.) between each electronic installation again, if without transcoding, then receiving terminal can't be play the multimedia file that transmit the transmission end.
Be generally the transmission end in existing transmission means the multimedia file that will transmit is sent to a server earlier, server is with multimedia file decoding, transcoding or after compressing, be resent to receiving terminal, this process is the resource and the time of utmost point consumption server often, cause load of server, and cause the transmission end to upload excessively taking of bandwidth simultaneously; When and for example running into multimedia file and be an instant image, then will cause very big load to server; Moreover the multimedia file that often upload the transmission end exceeds the capabilities limits that receiving terminal can be play, thereby causes and upload waste of network resources.
Summary of the invention
Therefore, be necessary to provide a kind of method of the reduction bit stream of efficient, the system and electronic installation of reduction bit stream of having more, to improve the existing in prior technology problem.
Main purpose of the present invention is providing a kind of method of bit stream, the system and electronic installation of reduction bit stream of reducing, particularly a kind ofly connect transmitting terminal and receiving terminal and obtain the transmission conditions data in point-to-point mode by network, transmitting terminal reduces the bit stream of multi-medium data or transcoding multi-medium data to receiving terminal according to the transmission conditions Data Dynamic.
For reaching above-mentioned purpose, the method for reduction bit stream of the present invention via network from the transmission end transmitting multimedia data to receiving terminal, wherein multi-medium data comprises first groups of pictures, this method comprises the following steps: to obtain the transmission conditions data; With first groups of pictures decoding and change into first color coding; According to the transmission conditions data first color coding is changed into second color coding; And second color coding is changed into second groups of pictures according to the transmission conditions data; Whereby, second groups of pictures after meeting the transmission conditions data and reducing bit stream can be transmitted to receiving terminal in the transmission end.
In one embodiment of this invention, with after the decoding of first groups of pictures and changing into the first color-coded step, also comprise the following steps: first color coding to be changed into second color coding according to algorithm and transmission conditions data.
In one embodiment of this invention, before the step that obtains the transmission conditions data, also comprise the following steps: to set up passage, passage connects transmitting terminal and receiving terminal and obtains the transmission conditions data in point-to-point mode.
For reaching above-mentioned purpose, the system of reduction bit stream of the present invention is used for transmitting multimedia data, multi-medium data transfers to receiving terminal by network from the transmission end, wherein multi-medium data comprises first groups of pictures, and first groups of pictures comprises a plurality of frames, and this system comprises detection module, decoder module, compression module, coding module and processing module.Wherein detection module is in order to obtain the transmission conditions data; Decoder module is in order to decode first groups of pictures and to change into first color coding; Compression module keeps in order to each frame deletion or the dissimilar part that will have similitude, and according to the transmission conditions data first color coding is formed second color coding; Coding module changes into second groups of pictures according to the transmission conditions data with second color coding; And processing module electrically connects detection module, decoder module, compression module and coding module, and processing module is in order to the operation of control detection module, decoder module, compression module and coding module.Whereby, second groups of pictures after meeting the transmission conditions data and reducing bit stream can be transmitted to receiving terminal in the transmission end.
In one embodiment of this invention, wherein detection module connects transmitting terminal and receiving terminal in point-to-point mode, and obtains the transmission conditions data.
For reaching above-mentioned purpose, electronic installation of the present invention can be by the Network Transmission multi-medium data to receiving terminal, and wherein multi-medium data comprises first groups of pictures, and first groups of pictures comprises a plurality of frames.Electronic installation comprises the system that reduces bit stream, and the system that wherein reduces bit stream comprises detection module, decoder module, compression module, coding module and processing module.Wherein detection module is in order to obtain the transmission conditions data; Decoder module is in order to decode first groups of pictures and to change into first color coding; Compression module forms second color coding in order to each frame deletion that will have similitude and according to these transmission conditions data with first color coding; Coding module changes into second groups of pictures according to the transmission conditions data with second color coding; And processing module electrically connects detection module, decoder module, compression module and coding module, and processing module is in order to the operation of control detection module, decoder module, compression module and coding module.Whereby, electronic installation can transmit second groups of pictures after meeting the transmission conditions data and reducing bit stream to receiving terminal.
In one embodiment of this invention, detection module connects electronic installation and receiving terminal in point-to-point mode, and obtains the transmission conditions data.
The present invention can carry out file transfer according to the transmission conditions data, has not only reduced load of server, and has saved Internet resources.
Description of drawings
Fig. 1 is the configuration diagram about an embodiment of the system of electronic installation of the present invention and reduction bit stream.
Fig. 2 is the flow chart of steps about an embodiment of the method for reduction bit stream of the present invention.
Description of reference numerals in the above-mentioned accompanying drawing is as follows:
1 electronic installation 10 reduces the system of bit stream
20 processing modules, 30 detection modules
40 decoder modules, 50 compression modules
60 coding modules, 80 networks
81 passages, 90 multi-medium datas
92 receiving terminals
Embodiment
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, cited below particularlyly go out preferred embodiment, and conjunction with figs., be described in detail below.
Below please refer to the configuration diagram of Fig. 1 about an embodiment of the system of electronic installation of the present invention and reduction bit stream thereof.
As shown in Figure 1, electronic installation 1 of the present invention is the transmission end, can be by network 80 transmitting multimedia datas 90 to receiving terminal 91, and wherein multi-medium data 90 comprises first groups of pictures (Group ofpictures, GOP), and first groups of pictures comprise a plurality of frames (frames).Electronic installation 1 comprises the system 10 that reduces bit stream, and the system 10 that wherein reduces bit stream comprises detection module 30, decoder module 40, compression module 50, coding module 60 and processing module 20, and above-mentioned each module is electrically connected to each other.
In one embodiment of this invention, processing module 20, detection module 30, decoder module 40, compression module 50 and coding module 60 can be software program, hardware, firmware or its combination and above-mentioned module individualism separately, perhaps the mode with combination exists, but the present invention is not as limit.For instance, the form that decoder module 40 and coding module 60 also can same modules exists.
In one embodiment of this invention, electronic installation 1 can be set up passage 81 in the mode of point-to-point (peer to peer) by network 80 and receiving terminal 92, to obtain the transmission conditions data.
Illustrate promptly below how the present invention carries out the method that reduces bit stream by the system 10 that reduces bit stream.
Below please in the lump referring to figs. 1 to the embodiment of Fig. 2 about the method for reduction bit stream of the present invention, wherein Fig. 2 is about the flow chart of steps of an embodiment of the method for reduction bit stream of the present invention.
The system 10 of reduction bit stream of the present invention is used for transmitting multimedia data 90, and multi-medium data 90 transfers to receiving terminal 92 by network 80 from electronic installation 1.In one embodiment of this invention, multi-medium data 90 is view data or real-time streaming data (real-time streaming data), but the present invention is not as limit, for instance, any image file (such as avi file, mpeg file, wmv file, mov file or 3gp file) all can be multi-medium data 90 of the present invention.Wherein the source of multi-medium data 90 can be electronic installation 1 or other external device (ED)s (figure does not show) institute provides, but the present invention is not as limit.It is noted that in one embodiment of this invention, electronic installation 1 is the transmission end.
In one embodiment of this invention, network 80 can be ADSL, CABLE broadband, optical fiber, WiMAX, GPRS, 3G, 3.5G or Wi-Fi (Wireless Fidelity) etc., but the present invention is not as limit.It is noted that in one embodiment of this invention, electronic installation 1 can lay respectively at different network environment (figure does not show) with receiving terminal 92.
As shown in Figure 2, the present invention at first carries out step S71: set up passage.
In one embodiment of this invention, electronic installation 1 is set up passage 81 by network 80 and receiving terminal 92 in point-to-point mode.
In one embodiment of this invention, electronic installation 1 or receiving terminal 92 can be respectively computer, notebook, server, mobile phone, personal digital assistant (Personal Digital Assistant, PDA), electronic game machine, digital camera or set-top box (Set-Top Box, STB), but the present invention not as limit.
Then carry out step S72: obtain the transmission conditions data.
In one embodiment of this invention, detection module 30 is obtained the transmission conditions data by passage 81, wherein the transmission conditions data comprise the bandwidth conditions of frame update rate (frame rate), reception bit rate (bitrate), frame resolution (resolution), played file form or the network 80 of receiving terminal 92, but the present invention is not as limit.
Then carry out step S73: with first groups of pictures decoding and change into first color coding.
In one embodiment of this invention, each frame is one of them of following map type: I image (intrapictures), P image (predictive pictures) and B image (bi-predictive pictures), when transmitting multimedia data 90, both transmitted with the combination of each I image, each P image and each B image, because the pass of groups of pictures and multi-medium data 90 is that persons of ordinary skill in the technical field of the present invention institute is known, so do not repeat them here.
In one embodiment of this invention, decoder module 40 is in order to decode first groups of pictures and to change into first color coding.In one embodiment of this invention, first color coding refers to Y value, U value and the V value of each frame of table, it represents brightness (luminance), colourity (chrominance) and concentration (chroma) respectively, since color coding and groups of pictures concern the persons of ordinary skill in the technical field of the present invention known, so do not repeat them here.
Then carry out step S74: first color coding is changed into second color coding according to algorithm and transmission conditions data.
In one embodiment of this invention, compression module 50 is compared each frame according to an algorithm (algorithm), will have each frame deletion of similitude and according to the transmission conditions data first color coding be formed second color coding, but the present invention is not as limit.For instance, compression module 50 is compared each frame according to another algorithm, and dissimilar each frame is kept, and will have each frame deletion of similitude and according to the transmission conditions data first color coding be formed second color coding.In a preferred embodiment of the present invention, compression module 50 changes into second color coding according to the frame update rate and the wideband condition of receiving terminal 92 with first color coding.
Further, after compression module 50 will have each frame deletion of similitude according to algorithm, can reduce the bit stream of multi-medium data 90; And if the frame update rate of receiving terminal 92 is if low and wideband condition is that compression module 50 can be done the program of compression again to first color coding, change into second color coding again, to reduce the bit stream of multi-medium data 90 under the slower condition.
For instance, if the frame update rate of original multi-medium data 90 is 30fps (frame per second), the frame update rate of receiving terminal 92 is 15ftp, and then compression module 50 will reduce the frame update rate of multi-medium data 90.Again for instance, if the wideband condition of receiving terminal 92 is slow (such as GPRS), then compression module 50 can reduce Y value, U value and the V value of each frame, with the reduction bit stream, and the quickening transmission speed.So, can avoid causing that the transmission end uploads bandwidth excessively takies the formation waste of network resources.
Then carry out step S75: second color coding is changed into second groups of pictures according to the transmission conditions data.
In one embodiment of this invention, coding module 60 changes into second groups of pictures according to the transmission conditions data with second color coding.In a preferred embodiment of the present invention, coding module 60 changes into second groups of pictures according to reception bit rate, frame resolution and the played file form of receiving terminal 92 with second color coding.
Further, if the reception bit rate and the frame resolution of receiving terminal 92 are lower, then coding module 60 is when doing coding to second color coding, the program (for example reducing the bit rate of multi-medium data 90) that can do compression again changes into second groups of pictures again, to reduce the bit stream of multi-medium data 90.
For instance, if the screen size of receiving terminal 92 is 3.5 inches (such as receiving terminal 92 is mobile phone), its frame resolution only 320 * 240, then coding module 60 can reduce to 320 * 240 with the frame resolution of second groups of pictures when coding.
Carry out step S76 at last: transmit second groups of pictures to receiving terminal.
In one embodiment of this invention, electronic installation 1 can directly transmit second groups of pictures to receiving terminal 92, the second groups of pictures by network 80 and is through the reduction bit stream and meets the multi-medium data 90 of transmission conditions data.
In one embodiment of this invention, electronic installation 1 can initiatively be carried out the method for reduction bit stream of the present invention to transmit multi-medium data 90 to receiving terminal 92, also can require the multi-medium data 90 of electronic installation 1 to carry out the method for reduction bit stream of the present invention again, but the present invention be as limit by receiving terminal 92.It is noted that the system and the electronic installation of the method for reduction bit stream of the present invention, reduction bit stream can be encoded into multi-medium data 90 transmission conditions data and the ability to play that meets receiving terminal 92 immediately and be delivered to receiving terminal 92.
In another embodiment of the present invention, electronic installation also can transmit multi-medium data (figure does not show) to receiving terminal again via server, because electronic installation reduces bit stream in advance, so can reduce the transmission time of multi-medium data in a large number and avoid waste of network resources.
It is noted that, the method for reduction bit stream of the present invention, reduce the system and the electronic installation of bit stream, support but be not limited to decoding and cataloged procedure changing the mechanism immediately for " make with produce carry out (on-the-fly) simultaneously ".
To sum up institute is old, and no matter the present invention all shows it totally different in the feature of known technology with regard to purpose, means and effect.It should be noted that above-mentioned many embodiment only give an example for convenience of explanation, the interest field that the present invention advocated should be as the criterion so that claim is described certainly, but not only limits to the foregoing description.
Claims (20)
1. a method that reduces bit stream is transmitted multi-medium data to a receiving terminal via a network from a transmission end, and wherein this multi-medium data comprises one first groups of pictures, and the method for this reduction bit stream comprises the following steps:
Obtain transmission conditions data;
With the decoding of this first groups of pictures and change into one first color coding;
According to these transmission conditions data this first color coding is changed into one second color coding; And
According to these transmission conditions data this second color coding is changed into one second groups of pictures;
Whereby, this second groups of pictures after meeting these transmission conditions data and reducing bit stream can be transmitted to this receiving terminal in this transmission end.
2. the method for reduction bit stream as claimed in claim 1 also comprises the following steps:
According to an algorithm and this transmission conditions data this first color coding is changed into this second color coding.
3. the method for reduction bit stream as claimed in claim 2, wherein this first groups of pictures comprises a plurality of frames, this algorithm is compared each frame, will have each frame deletion of similitude or dissimilar each frame is kept.
4. the method for reduction bit stream as claimed in claim 3 before the step of these transmission conditions data that obtain this receiving terminal, also comprises the following steps:
Set up a passage, this passage connects this transmitting terminal and this receiving terminal in point-to-point mode.
5. the method for reduction bit stream as claimed in claim 4, wherein these transmission conditions data comprise a frame update rate of this receiving terminal, a reception bit rate of this receiving terminal, a frame resolution of this receiving terminal, a played file form or a wideband condition of this receiving terminal.
6. the method for reduction bit stream as claimed in claim 5 also comprises the following steps:
This frame update rate and this wideband condition according to this algorithm, this receiving terminal change into this second color coding with this first color coding; And
According to this reception bit rate of this receiving terminal, this frame resolution of this receiving terminal and this played file form of this receiving terminal this second color coding is changed into one second groups of pictures.
7. the method for reduction bit stream as claimed in claim 6 also comprises the following steps:
Transmit this multi-medium data to this receiving terminal.
8. the method for reduction bit stream as claimed in claim 1, this multi-medium data are a view data or a real-time streaming data.
9. the method for reduction bit stream as claimed in claim 1, this receiving terminal are a computer, a notebook, a server, a mobile phone, a personal digital assistant, an electronic game machine, a digital camera or a set-top box.
10. as the method for claim 1 a described reduction bit stream, this transmission end is a computer, a mobile computer, a server, a mobile phone, a personal digital assistant, an electronic game machine, a digital camera or a set-top box.
11. system that reduces bit stream, be used to transmit a multi-medium data, this multi-medium data transfers to a receiving terminal by a network from a transmission end, and wherein this multi-medium data comprises one first groups of pictures, this first groups of pictures comprises a plurality of frames, and the system of this reduction bit stream comprises:
One detection module is in order to obtain transmission conditions data;
One decoder module is in order to decode this first groups of pictures and to change into one first color coding;
One compression module keeps in order to each frame deletion that will have similitude or with dissimilar each frame and according to these transmission conditions data this first color coding is formed one second color coding;
One coding module changes into one second groups of pictures according to these transmission conditions data with this second color coding; And
One processing module electrically connects this detection module, this decoder module, this compression module and this coding module, and this processing module is in order to control the operation of this detection module, this decoder module, this compression module and this coding module;
Whereby, this second groups of pictures after meeting these transmission conditions data and reducing bit stream can be transmitted to this receiving terminal in this transmission end.
12. the system of reduction bit stream as claimed in claim 11, wherein this detection module connects this transmitting terminal and this receiving terminal in point-to-point mode, and obtains this transmission conditions data.
13. the system of reduction bit stream as claimed in claim 12, wherein these transmission conditions data comprise a frame update rate of this receiving terminal, a reception bit rate of this receiving terminal, a frame resolution of this receiving terminal, a played file form or a wideband condition of this receiving terminal.
14. the system of reduction bit stream as claimed in claim 11, wherein this multi-medium data is a view data or a real-time streaming data.
15. the system of reduction bit stream as claimed in claim 11, this receiving terminal is a computer, a notebook, a server, a mobile phone, a personal digital assistant, an electronic game machine, a digital camera or a set-top box.
16. the system of reduction bit stream as claimed in claim 11, this transmission end is a computer, a notebook, a server, a mobile phone, a personal digital assistant, an electronic game machine, a digital camera or a set-top box.
17. an electronic installation can pass through a Network Transmission one multi-medium data to a receiving terminal, wherein this multi-medium data comprises one first groups of pictures, and this first groups of pictures comprises a plurality of frames, and this electronic installation comprises:
One reduces the system of bit stream, and the system of this reduction bit stream comprises:
One detection module is in order to obtain transmission conditions data;
One decoder module is in order to decode this first groups of pictures and to change into one first color coding;
One compression module keeps in order to each frame deletion that will have similitude or with dissimilar each frame and according to these transmission conditions data this first color coding is formed one second color coding;
One coding module changes into one second groups of pictures according to these transmission conditions data with this second color coding; And
One processing module electrically connects this detection module, this decoder module, this compression module and this coding module, and this processing module is in order to control the operation of this detection module, this decoder module, this compression module and this coding module;
Whereby, this electronic installation can transmit this second groups of pictures after meeting these transmission conditions data and reducing bit stream to this receiving terminal.
18. electronic installation as claimed in claim 17, wherein this detection module connects this electronic installation and this receiving terminal in point-to-point mode, and obtains this transmission conditions data.
19. electronic installation as claimed in claim 18, wherein these transmission conditions data comprise a frame update rate of this receiving terminal, a reception bit rate of this receiving terminal, a frame resolution of this receiving terminal, a played file form or a wideband condition of this receiving terminal.
20. electronic installation as claimed in claim 16, this electronic installation are a computer, a notebook, a server, a mobile phone, a personal digital assistant, an electronic game machine, a digital camera or a set-top box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910007768A CN101814969A (en) | 2009-02-24 | 2009-02-24 | Method and system for reducing bit stream and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910007768A CN101814969A (en) | 2009-02-24 | 2009-02-24 | Method and system for reducing bit stream and electronic device |
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| CN101814969A true CN101814969A (en) | 2010-08-25 |
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| CN200910007768A Pending CN101814969A (en) | 2009-02-24 | 2009-02-24 | Method and system for reducing bit stream and electronic device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106790653A (en) * | 2017-01-17 | 2017-05-31 | 上海泓智信息科技有限公司 | Document transmission processing method and device |
| CN113709510A (en) * | 2021-08-06 | 2021-11-26 | 联想(北京)有限公司 | High-speed data real-time transmission method and device, equipment and storage medium |
-
2009
- 2009-02-24 CN CN200910007768A patent/CN101814969A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106790653A (en) * | 2017-01-17 | 2017-05-31 | 上海泓智信息科技有限公司 | Document transmission processing method and device |
| CN113709510A (en) * | 2021-08-06 | 2021-11-26 | 联想(北京)有限公司 | High-speed data real-time transmission method and device, equipment and storage medium |
| US11843812B2 (en) | 2021-08-06 | 2023-12-12 | Lenovo (Beijing) Limited | High-speed real-time data transmission method and apparatus, device, and storage medium |
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Application publication date: 20100825 |