CN1622632A - A video decoding method for implementing zoom - Google Patents
A video decoding method for implementing zoom Download PDFInfo
- Publication number
- CN1622632A CN1622632A CN 200410102693 CN200410102693A CN1622632A CN 1622632 A CN1622632 A CN 1622632A CN 200410102693 CN200410102693 CN 200410102693 CN 200410102693 A CN200410102693 A CN 200410102693A CN 1622632 A CN1622632 A CN 1622632A
- Authority
- CN
- China
- Prior art keywords
- unit data
- frame
- data piece
- divergent
- convergent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000012958 reprocessing Methods 0.000 claims description 7
- 238000013139 quantization Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 12
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Abstract
The video zooming decoding process includes the following steps: performing the length code decoding, reverse discrete cosine conversion, reverse quantizing and reverse prediction to obtain decoded unit data block of the current frame; zooming the decoded unit data block of the current frame to obtain zoomed unit data block; and splicing and post-treating obtained unit data blocks to obtain the zoomed image of the current frame. The present invention has reduced calculation amount of the current frame, can perform the zooming operation of other unit data blocks while decoding one unit data block, and thus has raised decoding speed and raised real-time property.
Description
Technical field
The present invention relates to video signal processing field, particularly a kind of video encoding/decoding method of realizing convergent-divergent.
Background technology
The Mpeg standard is by Motion Picture Experts Group (Moving Picture Expert Group, MPEG) standard of Kai Fa a series of evolution that are used for video and audio compression.According to the Mpeg standard, comprise three compositions behind the video image compression coding: I frame, P frame and B frame.Wherein the reference frame pattern is adopted in the compression of I frame, and compression in the frame only is provided; The P frame adopts predictive coding, and the I frame that prediction present frame and front are nearest or the difference of P frame are compressed, and have considered kinetic characteristic; The B frame is two-way interframe encode, compresses based on nearest I frame in present frame and front and back or the difference between the P two field picture.(Discrete Cosine Transform DCT), quantizes the result, and variable-length encoding, has promptly formed the Mpeg code stream behind the coding, and the frame preface of typical Mpeg-4 code stream is: IBBPBBPBBPI... just to adopt discrete cosine transform after frame is determined
When the Mpeg-4 code stream is decoded, need take different processing procedures respectively for I frame, P frame and B frame.
As shown in Figure 1, generally the processing procedure for the I frame is: at first the I frame data are carried out decoding length changeable code, inverse quantization, inverse discrete cosine transformation (Inverse Discrete Cosine Transform, IDCT) and instead predict that the back forms the time-space domain view data of this frame, the image of this I frame will be obtained after the processing such as its splicing and elimination blocking effect, then this two field picture is carried out zoom operations, obtain image behind the final convergent-divergent.
As shown in Figure 2, processing procedure for P frame or B frame is: the residual error data and the motion vector that at first P frame or B frame are carried out obtaining after decoding length changeable code, inverse quantization, IDCT, the anti-prediction this frame, then according to the compensation of taking exercises of residual error data, motion vector and reference picture, obtain the view data after the motion compensation of this frame, then this two field picture is carried out zoom operations, obtain image behind the final convergent-divergent.
From such scheme as can be seen, prior art is put in order two field picture after decoder decode goes out to put in order frame data zoom operations, and the convergent-divergent of video decode and image all has quite high amount of calculation, therefore the amount of calculation of prior art is big, be difficult to satisfy real-time requirement, the especially occasion of having relatively high expectations of system in real-times such as embedded systems.
Summary of the invention
In view of this, the present invention proposes a kind of video encoding/decoding method of realizing convergent-divergent, its purpose is to reduce the amount of calculation of system, improves the real-time of system operation.
According to above-mentioned purpose, a kind of video encoding/decoding method of realizing convergent-divergent is provided, this method may further comprise the steps:
A. current frame data is carried out decoding length changeable code, inverse discrete cosine transformation, inverse quantization and anti-prediction, obtain the decoded unit data piece of present frame;
B. described decoded unit data piece is carried out zoom operations, obtain the unit data piece behind the convergent-divergent;
C. the unit data piece that described step B is obtained splices and reprocessing, obtains image behind the convergent-divergent of present frame.
Preferably, described unit data piece is piece (Block).
Preferably, described unit data piece is macro block (Macro Block).
Described zoom operations adopts closes on method most, or bilinear interpolation, or cubic spline interpolation.
Described reprocessing comprises eliminates the blocking effect operation.
Further, the decoded unit data piece of described present frame comprises the residual error data of unit data piece and the motion vector of unit data piece; Described step B comprises: the residual error data to described unit data piece is carried out zoom operations, obtains the residual error data of the unit data piece behind the convergent-divergent; Motion vector to described unit data piece carries out zoom operations, obtains the motion vector of the unit data piece behind the convergent-divergent; Carry out motion compensation according to the residual error data of the unit data piece behind the described convergent-divergent, the motion vector of unit data piece behind the convergent-divergent and the reference units data block after the motion compensation, the unit data that obtains after the motion compensation is fast.
Reference units data block after the described motion compensation is the unit data piece after the motion compensation of I frame nearest before the present frame or P frame.
Reference units data block after the described motion compensation is the unit data piece after the motion compensation of I frame nearest after unit data piece after the motion compensation of I frame nearest before the present frame or P frame and the present frame or P frame.
The coded system that described current frame data adopts is Mpeg-1, Mpeg-2, Mpeg-4, H.261, H.263 or H.264.
From such scheme as can be seen, because the present invention goes out unit residual error data piece and motion vector after decoder goes out the unit data piece to the I frame decoding or to P frame or B frame decoding after, before motion compensation and image splicing, finished zoom operations, be that the object that the present invention carries out zoom operations is not whole two field picture, but the data volume of unit data block size, the present invention is when the some unit data pieces to present frame carry out zoom operations, can carry out the decode operation of other data block, shorten the processing time of whole frame data.From top analysis as can be seen, the present invention has shortened the processing time of whole frame data, has improved the real-time of system operation.
Description of drawings
Fig. 1 is a schematic flow sheet of handling the I two field picture in the prior art;
Fig. 2 is a schematic flow sheet of handling P frame or B two field picture in the prior art;
Fig. 3 is the schematic diagram that unit carries out convergent-divergent with the piece for the present invention;
Fig. 4 handles the schematic flow sheet of I two field picture for the present invention;
Fig. 5 handles the schematic flow sheet of P frame or B two field picture for the present invention;
Fig. 6 is a YUV420 form schematic diagram.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in more detail by the following examples.
In Mpeg-4, the tissue of data adopted macro block (Macro Block, MB) and the technology of piece (Block).Macro block has adopted 16 * 16 size, and piece has adopted 8 * 8 size.For unified operation, be that the present invention will be described for example as the unit data piece only here to adopt 8 * 8 piece.As shown in Figure 3, be 8 * 8 piece originally, through behind the convergent-divergent, the size of new data block is m * n.Certainly, also can use macro block as the unit data piece.
As shown in Figure 4 be the processing procedure of the present invention for the I frame.
As shown in Figure 5 be the processing procedure of the present invention for P frame or B frame.Processing procedure with the P frame is an example:
Step 502 is carried out convergent-divergent to the residual error data of each 8 * 8 size, can select methods such as the method for closing on most, bilinear interpolation and bicubic spline interpolation as required, obtains the residual error data piece of m * n size behind the convergent-divergent.
V
x＝V
x′·m/8
V
y＝V
y′·n/8。
Processing procedure and P frame for the B frame are roughly the same, and difference is: the reference data piece of B frame has two in step 504, is the nearest I frame in the data block of nearest I frame in front or P frame and back or the data block of P frame.
Obtain I frame, P frame and B two field picture in the Mpeg-4 code stream according to above-mentioned steps, just formed video sequence.
The present invention can be applied in the encoding scheme of any processing I frame, P frame or B frame, for example: Mpeg-1, Mpeg-2, H.261, H.263 and H.264 wait.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1, a kind of video encoding/decoding method of realizing convergent-divergent is characterized in that, this method may further comprise the steps:
A. current frame data is carried out decoding length changeable code, inverse discrete cosine transformation, inverse quantization and anti-prediction, obtain the decoded unit data piece of present frame;
B. described decoded unit data piece is carried out zoom operations, obtain the unit data piece behind the convergent-divergent;
C. the unit data piece that described step B is obtained splices and reprocessing, obtains image behind the convergent-divergent of present frame.
2, method according to claim 1 is characterized in that, described unit data piece is piece (Block).
3, method according to claim 1 is characterized in that, described unit data piece is macro block (Macro Block).
4, method according to claim 1 is characterized in that, described zoom operations adopts closes on method most, or bilinear interpolation, or cubic spline interpolation.
5, method according to claim 1 is characterized in that, described reprocessing comprises eliminates the blocking effect operation.
6, method according to claim 1 is characterized in that, the decoded unit data piece of described present frame comprises the residual error data of unit data piece and the motion vector of unit data piece;
Described step B comprises: the residual error data to described unit data piece is carried out zoom operations, obtains the residual error data of the unit data piece behind the convergent-divergent; Motion vector to described unit data piece carries out zoom operations, obtains the motion vector of the unit data piece behind the convergent-divergent; Carry out motion compensation according to the residual error data of the unit data piece behind the described convergent-divergent, the motion vector of unit data piece behind the convergent-divergent and the reference units data block after the motion compensation, the unit data that obtains after the motion compensation is fast.
7, method according to claim 6 is characterized in that, the reference units data block after the described motion compensation is the unit data piece after the motion compensation of I frame nearest before the present frame or P frame.
8, method according to claim 6, it is characterized in that the reference units data block after the described motion compensation is the unit data piece after the motion compensation of I frame nearest after unit data piece after the motion compensation of I frame nearest before the present frame or P frame and the present frame or P frame.
9, method according to claim 1 is characterized in that, the coded system that described current frame data adopts is Mpeg-1, Mpeg-2, Mpeg-4, H.261, H.263 or H.264.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101026931A CN1333601C (en) | 2004-12-27 | 2004-12-27 | A video decoding method for implementing zoom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101026931A CN1333601C (en) | 2004-12-27 | 2004-12-27 | A video decoding method for implementing zoom |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1622632A true CN1622632A (en) | 2005-06-01 |
| CN1333601C CN1333601C (en) | 2007-08-22 |
Family
ID=34766828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004101026931A Expired - Fee Related CN1333601C (en) | 2004-12-27 | 2004-12-27 | A video decoding method for implementing zoom |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1333601C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100375107C (en) * | 2006-01-18 | 2008-03-12 | 北京飞天诚信科技有限公司 | Fingerprint image fragment splicing method |
| CN102368822A (en) * | 2011-06-28 | 2012-03-07 | 上海盈方微电子有限公司 | Architecture method of video decoding output model |
| CN101552897B (en) * | 2008-07-11 | 2012-12-19 | 深圳市创凯电子有限公司 | Method and apparatus for achieving the display of mosaicing high definition base image by using a U disk or/and a flash memory |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000004442A (en) * | 1998-06-15 | 2000-01-07 | Hitachi Ltd | Decoding and display device for digital-coded image data |
| US6580759B1 (en) * | 2000-11-16 | 2003-06-17 | Koninklijke Philips Electronics N.V. | Scalable MPEG-2 video system |
| CN1213613C (en) * | 2003-09-12 | 2005-08-03 | 浙江大学 | Prediction method and apparatus for motion vector in video encoding/decoding |
-
2004
- 2004-12-27 CN CNB2004101026931A patent/CN1333601C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100375107C (en) * | 2006-01-18 | 2008-03-12 | 北京飞天诚信科技有限公司 | Fingerprint image fragment splicing method |
| CN101552897B (en) * | 2008-07-11 | 2012-12-19 | 深圳市创凯电子有限公司 | Method and apparatus for achieving the display of mosaicing high definition base image by using a U disk or/and a flash memory |
| CN102368822A (en) * | 2011-06-28 | 2012-03-07 | 上海盈方微电子有限公司 | Architecture method of video decoding output model |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1333601C (en) | 2007-08-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2230852A2 (en) | Method and apparatus for weighted prediction in predictive frames | |
| EP1359764B1 (en) | Video encoding method with fading compensation | |
| CN1611077A (en) | Spatial scalable compression | |
| CN1819658A (en) | Method and device for coding a video picture in inter or intra mode | |
| CN1751521A (en) | Image decoding device, image decoding method, and image decoding program | |
| WO2009073421A2 (en) | System and methods for improved video decoding | |
| JP2009531980A (en) | Method for reducing the computation of the internal prediction and mode determination process of a digital video encoder | |
| JP2003250157A (en) | Optimal scanning method for transform coefficients in coding/decoding of still image and moving image | |
| US10298955B2 (en) | Non-transform coding | |
| CN1708134A (en) | Method and apparatus for estimating motion | |
| CN1414793A (en) | Compression video decoder with contraction image function and its method | |
| US7502415B2 (en) | Range reduction | |
| CN1347621A (en) | Reducing 'blocking picture' effects | |
| US20060133490A1 (en) | Apparatus and method of encoding moving picture | |
| CN1947146A (en) | Method of down-sampling data values | |
| KR100697516B1 (en) | Moving picture coding method based on 3D wavelet transformation | |
| CN1622632A (en) | A video decoding method for implementing zoom | |
| CN1166208C (en) | Transcoding method and device | |
| CN111757109A (en) | High-real-time parallel video coding and decoding method, system and storage medium | |
| CN1302666C (en) | Appts. and method of coding moving picture | |
| CN100372382C (en) | Video image coding method | |
| CN1327345A (en) | Video frequency source coding by movement prediction and block effect filtering | |
| CN101150721A (en) | Coding method and system with adaptable bit element plane coding mode | |
| CN1190970C (en) | Video reproducing device with quick postprocessing | |
| CN1823530A (en) | Encoding method and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: GUANGDONG ZHONGXING ELECTRONICS CO., LTD. Free format text: FORMER OWNER: BEIJING VIMICRO CORPORATION Effective date: 20150311 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100083 HAIDIAN, BEIJING TO: 519031 ZHUHAI, GUANGDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20150311 Address after: 519031 Guangdong city of Zhuhai province Hengqin Baohua Road No. 6, room 105 -478 Patentee after: GUANGDONG ZHONGXING ELECTRONICS CO., LTD. Address before: 100083, Haidian District, Xueyuan Road, Beijing No. 35, Nanjing Ning building, 15 Floor Patentee before: Beijing Vimicro Corporation |
|
| DD01 | Delivery of document by public notice |
Addressee: GUANGDONG ZHONGXING ELECTRONICS CO., LTD. Document name: Notification of Passing Examination on Formalities |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Shen Yingming Document name: payment instructions |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Shen Yingming Document name: Notice of termination of patent right |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070822 Termination date: 20201227 |