CN1832576A - Method and device for processing video signal - Google Patents
Method and device for processing video signal Download PDFInfo
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- CN1832576A CN1832576A CN 200510052639 CN200510052639A CN1832576A CN 1832576 A CN1832576 A CN 1832576A CN 200510052639 CN200510052639 CN 200510052639 CN 200510052639 A CN200510052639 A CN 200510052639A CN 1832576 A CN1832576 A CN 1832576A
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Abstract
This invention provides a device for processing video signals including at least N pictures, in which, said device contains a coding module and a selection module and the coding module is for carrying out coding programs from the first to the Nth and coding pictures from the first to the Nth in a total image coding mode and coding the other pictures in the N pictures in an adaptive image coding mode then computing the total data volume of the N coded pictures in the coding programs, said selecting module is used in selecting the N coded pictures corresponding to the smallest total data volume in the coding programs.
Description
Technical field
The present invention relates to a kind of device and method of processing one video signal, particularly relate to a kind of device and method the video signal compression.
Background technology
One video signal is made up of a series of picture (frame).Because the effect of the persistence of vision, the still frame of playing promptly becomes the video signal with dynamic effect for the beholder continuously.In general video signal treatment system, before transmitting or storing a video signal, can earlier the picture in this video signal be compressed usually.If earlier the picture in the video signal is not compressed, storage area that needs when transmitting or storing and frequency range require all suitable big.
One of characteristic of video signal is space repeatability (temporal redundancy), that is in a video signal of forming by continuous pictures, may have high correlation between adjoining picture, so most data are identical between picture and the picture.For example, under the scene that a people walks about, background almost is constant.
For reducing the empty or transmission resource of storage that space repeatability takies, the compression method that produces at this target can roughly be divided into two kinds: not with reference to other picture, the picture that compresses with the total image coding mode is commonly referred to as I-frame (intra-frame) to (1) total image coding mode (full-image-encoding mode) when compression one picture; (2) adaptability image coding pattern (adaptive-image-encoding mode) compression during one picture with reference to this picture before a picture or several contiguous pictures, picture through adaptability image coding mode producing is commonly referred to as P-frame (predictive frame) or B-frame (Bi-direction predictive frame), p-frame only comprises the difference that is compressed picture and reference picture, and therefore the data volume after the compression is little than I-frame.Relatively, p-frame can't independent decoded regeneration (regenerate), reference picture (may be I-frame or I-frame and other p-frame) in the time of also must utilizing compression when p-frame is deciphered could be reduced to p-frame the preceding picture of compression.
Though the data volume of p-frame is less, be not best compress mode with adaptability image coding mode compression in fact with most picture.Because each p-frame all needs with reference to I-frame or p-frame before, if having some picture to be lost in the process of transmission, follow-up picture will continue to make a mistake, up to receiving that another new I-frame just can revert to correct picture.The above-mentioned situation that continues to make a mistake is called error propagation (error propagation).For reducing the influence of error propagation, general host-host protocol can stipulate that is called a video signal object plane (Video objectplane, VOP) parameter value, and according to fixing interval transmission I-frame, VOP promptly represents every several frame and just sends an I-frame.If VOP is 3, then representing just has an I-frame and two p-frame among three frame of every transmission.
In the prior art, set after the VOP parameter, the order of I-frame and p-frame also is determined simultaneously.Yet the selection of I-frame can influence needs data quantity transmitted.If selection is proper, will have the picture of significantly change or the picture boil down to I-frame that scene changes, then the data volume of p-frame also can drop to minimum.Prior art all is that the VOP parameter is made as definite value, and first picture in fixing each video signal of selection (or picture group) is as I-frame.Therefore, the data volume after the mode of selection I-frame can not guarantee to compress in the prior art is minimum.
The invention provides a kind of device and method of processing one video signal.More particularly, device and method according to the present invention is when the compression video signal, earlier by respectively each picture being assumed to be I-frame in one group of N picture, other picture being assumed to be P-frame, and calculate the total amount of data after this video signal compresses corresponding to each different I-frame, select combination again corresponding to the I-frame and the p-frame of minimum data amount.By this, the data volume after can guaranteeing to compress according to device and method of the present invention is minimum.
Summary of the invention
A main purpose of the present invention is to provide a kind of device and method of processing one video signal, and wherein this video signal has N picture.
Device according to a preferred embodiment of the present invention comprises a coding module and a selection module.This coding module is in order to carry out one first coded program to N coded program.This first coded program to this N coded program is respectively with N picture coding of first picture to the in this N picture with a total image coding mode, in addition with an adaptability image coding pattern with remaining picture coding in this N picture, and calculate this N total amount of data of passing through the picture after encoding in each coded program respectively.This selection module is in order to by this N the picture of selecting in the coded program of described executed corresponding to minimum total amount of data through encoding.
Device according to another preferred embodiment of the present invention further comprises a timer.This timer is set a default time cycle with the running of thinking this coding module and this selection module.When this coding module began to carry out this first coded program, this timer began to calculate a processing time.In case should the processing time greater than this default time cycle, this selections module is promptly by selecting this N corresponding to minimum total amount of data to pass through the picture of encoding in the coded program of described executed.
The advantages and spirit of the present invention can be by being further understood below in conjunction with the detailed description of accompanying drawing to invention.
Description of drawings
Fig. 1 shows the structure chart according to the video signal processing unit of first preferred embodiment of the present invention.
Fig. 2 shows the flow chart according to the video signal processing method of the 3rd preferred embodiment of the present invention.
Fig. 3 shows the flow chart according to the video signal processing method of the 4th preferred embodiment of the present invention.
Fig. 4 shows the structure chart according to the video signal treatment system of the 5th preferred embodiment of the present invention.
The reference numeral explanation
10: video signal processing unit 11: coding module
12: select module 13: first memory
14: delivery module 15: receiver module
16: second memory
S21～S25: steps flow chart S31～S38: steps flow chart
40: video signal treatment system 41: coding module
42: select module 43: memory
44: access module 45: rebuilding module
Embodiment
Main purpose of the present invention is to provide a kind of device and method of processing one video signal, and wherein this video signal has N picture.
Video signal processing unit according to first preferred embodiment of the present invention comprises a coding module and a selection module at least.This coding module is in order to carry out one first coded program to N coded program.This first coded program to this N coded program is encoded N picture of first picture to the in this N picture respectively with the total image coding mode, other with remaining picture coding, opens and calculates respectively this N total amount of data through the picture behind the coding in each coded program with adaptability image coding pattern.For example when carrying out first coded program, this coding module be with the total image coding mode with first picture coding, obtain the packed data of first picture; Other with adaptability image coding pattern-coding, obtains second picture to the N picture the packed data of second picture to the N picture, and calculates the sum total of N picture packed data of above-mentioned first picture to the.When carrying out second coded program, this coding module be with the total image coding mode with second picture coding, obtain the packed data of second picture; In addition with first and the 3rd picture to a N picture with adaptability image coding pattern-coding, obtain the packed data of first and the 3rd picture to a N picture, and calculate the sum total of above-mentioned N picture packed data.The 3rd to the N coded program by that analogy.
This selection module is in order to by N the picture of selecting in the coded program of executed corresponding to minimum total amount of data through encoding.
In practical application, N the picture through coding that this video signal processing unit can be selected this selection module is stored in the memory, also can be with this N the picture output through coding.This device has two kinds with the mode of described picture output.First kind of way of output is to transmit this N the picture through coding in regular turn according to the sequence number that described picture originally promptly had, or assign other sequence number earlier and give by this each picture through coding of selecting module to select, transmit this N picture more in regular turn through coding.If this device adopts first kind of mode with picture output, then this device can further comprise a dispatch module and a delivery module.This dispatch module is given each picture through coding of being selected by this selection module in order to assign other sequence number.This delivery module transmits this N the picture through coding in regular turn in order to according to described sequence number.This device also can comprise a receiver module, in order to according to described sequence number, receives this N the picture through coding in regular turn, and receiving terminal is waited to receive N the picture through coding and just deciphered.Second kind of way of output is the picture that transmits earlier with total image coding mode coding, transmits other picture with adaptability image coding pattern-coding again.If this device is to adopt second kind of mode with picture output, then this device can further comprise a delivery module.This delivery module in order to transmit earlier this N through in the picture of coding with the picture of total image coding mode coding, transmit in the picture that this N process encode picture again with adaptability image coding pattern-coding.This device also can comprise a receiver module, in order to receive this picture with total image coding mode coding earlier, receives and rebuild described picture with adaptability image coding pattern-coding more in regular turn.
With N=5 is example, if be the 3rd picture with the picture of total image coding mode coding, and this device takes first kind of way of output, and then the delivery module in this device is exported first to the 5th picture in regular turn.Receiver module in this device also receives first to the 5th picture in regular turn.Since first picture be with reference to the 3rd picture with adaptability image coding pattern-coding, before receiving the 3rd picture, this receiver module can't and be rebuild first picture decoding behind the coding.Therefore this device must comprise a memory, and first picture behind the coding that receives is temporary in this memory, and the 3rd picture after this receiver module receives coding could be according to the 3rd picture with first picture codec and reconstruction.On the other hand, if this this device is to take second kind of way of output, the 3rd picture behind this delivery module elder generation output encoder then, then output with adaptability image coding pattern-coding first and second, four and five pictures.Therefore receiver module receives the 3rd picture behind the coding earlier, receives first picture behind the coding again.After first the picture decoding after this receiver module will be encoded, promptly can be according to the 3rd picture with first picture codec.
See also Fig. 1.Fig. 1 shows the structure chart according to the video signal processing unit of first preferred embodiment of the present invention.Video signal processing unit 10 comprises a coding module 11, and selects module 12, a first memory 13, a delivery module 14, a receiver module 15 and a second memory 16.
In practical application, the mode that this coding module carries out adaptability image coding pattern-coding also has two kinds.First kind of coded system is in this i coded program, according to i picture in this N picture with other picture with adaptability image coding pattern-coding, wherein i is the integer index of a scope between 1 to N.Second kind of coded system is in this i coded program, and one of described picture with adaptability image coding pattern-coding is according to i picture and other picture coding with adaptability image coding pattern-coding in this N picture.When this device was required to rebuild described picture, this device can further comprise a memory, an access module and a rebuilding module.This memory is in order to store by this this N picture through coding selecting module to select.The picture of this access module in order to be stored by this N of access in this memory.If this device adopts first kind of coded system, then this rebuilding module is in order to rebuild described picture with adaptability image coding pattern-coding according to the picture that is somebody's turn to do with total image coding mode coding.If this device adopts second kind of coded system, then this rebuilding module is in order to rebuild described with the picture in the picture of adaptability image coding pattern-coding according to the picture and other picture with adaptability image coding pattern-coding that are somebody's turn to do with total image coding mode coding.
In some practical application, for the compression one video signal time can limit to some extent.Therefore, select further to comprise a timer the module except a coding module and according to the video signal processing unit of second preferred embodiment of the present invention.This timer is set a default time cycle with the running of thinking this coding module and this selection module, this timer begins to calculate a processing time when this coding module begins to carry out this first coded program, in case should the processing time greater than this default time cycle, this selections module is promptly by selecting this N corresponding to minimum total amount of data to pass through the picture of encoding in the coded program of described executed.
See also Fig. 2.Fig. 2 shows the flow chart according to the video signal processing method of the 3rd preferred embodiment of the present invention.This video signal processing method is execution in step S21 at first, sets an index i and equals 1.Then in step S22, carry out an i coded program.This i coded program be with a total image coding mode with i picture coding in this N picture, with an adaptability image coding pattern with remaining picture coding in this N picture, and calculate this N through the total amount of data of picture behind the coding.Step S23 sets i=i+1.Step S24 checks that after step S23 whether i is greater than N.If the check result of step S24 is not for, this method then repeated execution of steps S22 to step S24.If the check result of step S24 is for being, execution in step S25 then is by this N the picture of selecting in the coded program of described executed corresponding to minimum total amount of data through encoding.
See also Fig. 3.Fig. 3 shows the flow chart according to the video signal processing method of the 4th preferred embodiment of the present invention.This video signal processing method is execution in step S31 at first, sets a default time cycle.Then in step S32, set an index i and equal 1.Step S33 begins to calculate a processing time.Then in step S34, carry out an i coded program.This i coded program with a total image coding mode with i picture coding in this N picture, with an adaptability image coding pattern with remaining picture coding in this N picture, and calculate this N through the total amount of data of picture behind the coding.Step S 35 checks that whether this processing time is greater than this default time cycle.If the check result of step S35 is that then this method is not set i=i+1 in step S36.Step S37 checks that after step S36 whether i is greater than N.If the check result of step S37 is not for, this method then repeated execution of steps S34 to step S37.If the check result of step S35 or step S37 is for being, execution in step S38 then is by this N the picture of selecting in the coded program of described executed corresponding to minimum total amount of data through encoding.
See also Fig. 4.Fig. 4 shows the structure chart according to the video signal treatment system of the 5th preferred embodiment of the present invention.This video signal treatment system 40 comprises a coding module 41, and selects module 42, a memory 43, an access module 44 and a rebuilding module 45, this this video signal treatment system 40 can be considered an image storage system, for example VCD or DVD disc cd-rom recorder, coding module 41 can be considered the image signal compression unit with selecting module 42, memory 43 can be hard disk or disk media etc., and access module 44 and rebuilding module 45 can be considered image fetch device.
Coding module 41 is in order to carry out one first coded program to N coded program.This first coded program to this N coded program respectively with a total image coding mode with N picture coding of first picture to the in this N picture, with an adaptability image coding pattern with remaining picture coding in this N picture, and calculate in each coded program this N total amount of data respectively through the picture behind the coding.Select module 42 in order to by this N the picture of selecting in the coded program of described executed corresponding to minimum total amount of data through encoding.This N the picture that memory 43 is selected in order to store selected module 42 through coding.The picture of access module 44 in order to be stored by this N of access in the memory 43.Rebuilding module 45 is in order to rebuild the described picture of encoding with the total image coding mode that reaches with adaptability image coding pattern-coding.
In practical application, video signal treatment system 40 also can comprise a timer, for a default time cycle is set in the running of coding module 41 and selection module 42.This timer begins to calculate a processing time when coding module 41 begins to carry out this first coded program, in case should the processing time greater than this default time cycle, select module 42 promptly by this N the picture of selecting in the coded program of described executed corresponding to minimum total amount of data through encoding.
In practical application, the mode that coding module 41 carries out adaptability image coding pattern-coding has two kinds.First kind of coded system is in this i coded program, according to i picture in this N picture with other picture with adaptability image coding pattern-coding, wherein i is the integer index of a scope between 1 to N.Second kind of coded system is in this i coded program, and one of described picture with adaptability image coding pattern-coding is according to i picture and other picture coding with adaptability image coding pattern-coding in this N picture.If video signal treatment system 40 adopts first kind of coded system, then rebuilding module 45 is according to rebuilding described picture with adaptability image coding pattern-coding with the picture of total image coding mode coding.If video signal treatment system 40 adopts second kind of coded system, then rebuilding module 45 is according to rebuilding described with the picture in the picture of adaptability image coding pattern-coding with picture and other picture with adaptability image coding pattern-coding of total image coding mode coding.
By the above detailed description of preferred embodiments, be to wish to know more to describe feature of the present invention and spirit, and be not to come category of the present invention is limited with above-mentioned disclosed preferred embodiment.On the contrary, its objective is that hope can contain in the category that is arranged in claim of the present invention of various changes and tool equality.
Claims (26)
1. method of handling a video signal, this video signal has N picture, and N is one greater than 1 natural number, and this method comprises:
(a) set an index i and equal 1;
(b) carry out an i coded program, in this i coded program with a total image coding mode with i picture coding in this N picture, with an adaptability image coding pattern with this N picture in remaining picture coding, and calculate this N through the total amount of data of picture behind the coding;
(c) set i=i+1, and whether check i greater than N, if check result is for being, execution in step (d) then is if check result is for denying that then repeating step (b) is to step (c); And
(d) by this N the picture of selecting in the coded program of described executed corresponding to minimum total amount of data through coding.
2. the method for claim 1 further comprises:
(a1) be that step (b) and step (c) are set a default time cycle;
(a2) in execution in step (a) afterwards, begin to calculate a processing time; And
(a3) in case should the processing time greater than this default time cycle, execution in step (d).
3. the method for claim 1 further comprises:
(e1) assign other sequence number and give selecteed each picture in step (d) through coding; And
(e2), transmit this N picture in regular turn through coding according to described sequence number.
4. method as claimed in claim 3 further comprises:
(f), receive this N picture in regular turn through coding according to described sequence number.
5. the method for claim 1 further comprises:
(e) transmit earlier this N through in the picture of coding with the picture of total image coding mode coding, transmit in the picture that this N process encode picture again with adaptability image coding pattern-coding.
6. method as claimed in claim 5 further comprises:
(f1) receive this picture with total image coding mode coding; And
(f2) receive and rebuild described picture in regular turn with adaptability image coding pattern-coding.
7 the method for claim 1, wherein in the i coded program of step (b), one of described picture with adaptability image coding pattern-coding is according to this i picture coding.
8. method as claimed in claim 7 further comprises:
(g1) be stored in selecteed this N picture in the step (d) through coding;
(g2) this N of access picture that is stored; And
(g3) according to rebuilding described picture with the picture of total image coding mode coding with adaptability image coding pattern-coding.
9. the method for claim 1, wherein in the i coded program of step (b), one of described picture with adaptability image coding pattern-coding is according to this i picture and other picture coding with adaptability image coding pattern-coding.
10. method as claimed in claim 9 further comprises:
(g1) be stored in selecteed this N picture in the step (d) through coding;
(g2) this N of access picture that is stored; And
(g3) according to rebuilding described with picture and other picture of total image coding mode coding with adaptability image coding pattern-coding with the picture in the picture of adaptability image coding pattern-coding.
11. a device of handling a video signal, this video signal has N picture, and N is one greater than 1 natural number, and this device comprises:
One coding module, this coding module is in order to carry out one first coded program to N coded program, this first coded program to this N coded program respectively with a total image coding mode with N picture coding of first picture to the in this N picture, with an adaptability image coding pattern with remaining picture coding in this N picture, and calculate in each coded program this N total amount of data respectively through the picture behind the coding; And
One selects module, and this selections module is in order to by selecting this N corresponding to minimum total amount of data to pass through the picture of encoding in the coded program of described executed.
12. device as claimed in claim 11 further comprises:
One timer, this timer is set a default time cycle with the running of thinking this coding module and this selection module, this timer begins to calculate a processing time when this coding module begins to carry out this first coded program, in case should the processing time greater than this default time cycle, this selections module is promptly by selecting this N corresponding to minimum total amount of data to pass through the picture of encoding in the coded program of described executed.
13. device as claimed in claim 11 further comprises:
One dispatch module, this dispatch module is given each picture through coding of being selected by this selection module in order to assign other sequence number; And
One delivery module, this delivery module transmits this N the picture through coding in regular turn in order to according to described sequence number.
14. device as claimed in claim 13 further comprises:
One receiver module, this receiver module receives this N the picture through coding in regular turn in order to according to described sequence number.
15. device as claimed in claim 11 further comprises:
One delivery module, this delivery module in order to transmit earlier this N through in the picture of coding with the picture of total image coding mode coding, transmit in the picture that this N process encode picture again with adaptability image coding pattern-coding.
16. device as claimed in claim 15 further comprises:
One receiver module, this receiver module receives and rebuilds described picture with adaptability image coding pattern-coding more in regular turn in order to receive this picture with total image coding mode coding earlier.
17. device as claimed in claim 11, wherein in this i coded program, one of described picture with adaptability image coding pattern-coding is according to i picture coding in this N picture, and wherein i is the integer index of a scope between 1 to N.
18. device as claimed in claim 17 further comprises:
One memory, this memory is in order to store by this this N picture through coding selecting module to select;
One access module, the picture of this access module in order to be stored by this N of access in this memory; And
One rebuilding module, this rebuilding module is in order to rebuild described picture with adaptability image coding pattern-coding according to the picture that is somebody's turn to do with total image coding mode coding.
19. device as claimed in claim 11, wherein in this i coded program, one of described picture with adaptability image coding pattern-coding is according to i picture and other picture coding with adaptability image coding pattern-coding in this N picture, and wherein i is the integer index of a scope between 1 to N.
20. device as claimed in claim 19 further comprises:
One memory, this memory is in order to store by this this N picture through coding selecting module to select;
One access module, the picture of this access module in order to be stored by this N of access in this memory; And
One rebuilding module, this rebuilding module is in order to rebuild described with the picture in the picture of adaptability image coding pattern-coding according to the picture and other picture with adaptability image coding pattern-coding that are somebody's turn to do with total image coding mode coding.
21. a system that handles a video signal, this video signal has N picture, and N is one greater than 1 natural number, and this system comprises:
One coding module, this coding module is in order to carry out one first coded program to N coded program, this first coded program to this N coded program respectively with a total image coding mode with N picture coding of first picture to the in this N picture, with an adaptability image coding pattern with remaining picture coding in this N picture, and calculate in each coded program this N total amount of data respectively through the picture behind the coding;
One selects module, and this selections module is in order to by selecting this N corresponding to minimum total amount of data to pass through the picture of encoding in the coded program of described executed;
One memory, this memory is in order to store by this this N picture through coding selecting module to select;
One access module, the picture of this access module in order to be stored by this N of access in this memory; And
One rebuilding module, this rebuilding module is in order to rebuild the described picture of encoding with the total image coding mode that reaches with adaptability image coding pattern-coding.
22. system as claimed in claim 21 further comprises:
One timer, this timer is set a default time cycle with the running of thinking this coding module and this selection module, this timer begins to calculate a processing time when this coding module begins to carry out this first coded program, in case should the processing time greater than this default time cycle, this selections module is promptly by selecting this N corresponding to minimum total amount of data to pass through the picture of encoding in the coded program of described executed.
23. system as claimed in claim 21, wherein in this i coded program, one of described picture with adaptability image coding pattern-coding is according to i picture coding in this N picture, and wherein i is the integer index of a scope between 1 to N.
24. system as claimed in claim 23, wherein this rebuilding module is according to rebuilding described picture with adaptability image coding pattern-coding with the picture of total image coding mode coding.
25. system as claimed in claim 21, wherein in this i coded program, one of described picture with adaptability image coding pattern-coding is according to i picture and other picture coding with adaptability image coding pattern-coding in this N picture, and wherein i is the integer index of a scope between 1 to N.
26. system as claimed in claim 25, wherein this rebuilding module is according to rebuilding described with the picture in the picture of adaptability image coding pattern-coding with picture and other picture with adaptability image coding pattern-coding of total image coding mode coding.
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| CNB2005100526395A CN100414999C (en) | 2005-03-07 | 2005-03-07 | Method and device for processing video signal |
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| CN104967856A (en) * | 2015-06-25 | 2015-10-07 | 华为技术有限公司 | Coding method and corresponding device |
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| JP2970417B2 (en) * | 1994-08-22 | 1999-11-02 | 日本電気株式会社 | Video coding method |
| DE19626108A1 (en) * | 1996-06-28 | 1998-01-08 | Thomson Brandt Gmbh | Digital image signal coding method e.g. for Digital Video Broadcasting |
| JP3604864B2 (en) * | 1997-04-25 | 2004-12-22 | シャープ株式会社 | Video encoding device |
| US6553069B1 (en) * | 1999-06-17 | 2003-04-22 | Samsung Electronics Co., Ltd. | Digital image segmenting method and device |
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| CN104967856A (en) * | 2015-06-25 | 2015-10-07 | 华为技术有限公司 | Coding method and corresponding device |
| CN104967856B (en) * | 2015-06-25 | 2018-10-19 | 华为技术有限公司 | A kind of coding method and relevant device |
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