CN101084677A - Device and method for merging different video codec - Google Patents
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Abstract
The present invention is directed to a video unified codec device and its method. According to an embodiment of this invention, the unified codec device comprises parsing and decoding functional units (PD FUs) extracting and grouping context information, control signals, and data in bit streams inputted according to different syntax data per codec, macro-block-based functional units (MB-based FUs) unified based on block-based process units of each codec, for decoding data outputted from PD FUs, and a global control unit (GCU) for controlling MB-based FUs grouped after corresponding control signals and context information received from PD FUs to each codec and processing. By this invention, a new concept and structure of unified codec corresponding to similarities, differences, and considerations between different codecs can be presented.
Description
Technical field
The present invention relates to Video Codec, in particular be used for the equipment and the method for effectively unified MPEG-2, MPEG-3 and Video Codec H.264 and so on.
Background technology
In general, Video Decoder has similar structure, but the treatment of details of every kind of structure is then different.Owing to there are these differences, it is very difficult wanting unified different codec.
Fig. 1 shows is exemplary process based on the unified codec of routine techniques.And Fig. 1 has described the operating principle of a typical pure internal unity codec, and what wherein this description was paid close attention to is MPEG-2, MPEG-4 and AVC in-line coding.
With reference to figure 1, this function treatment comprises in order: resolve and entropy decoding processing S100, data reordering treatment S 110, inverse scan treatment S 120, contrary DC/AC prediction processing S130, re-quantization treatment S 140, inversion process S150, contrary intra-prediction treatment S 160, storage decoding sampling S170 and de-blocking filter treatment S 180.As mentioned above, routine techniques is divided by function or processing sequence simply, and each step all is configured to carry out treatment of details according to codec, causes having occurred the redundant treatment step of most thus.
In addition, though the remarkable difference between common component (for example handle, function or the like) and the stand-alone assembly is the prerequisite of unified codec, the similitude and the difference that want to distinguish according to routine techniques the codec structure aspect are very difficult.
In addition, except structure, do not propose at present other unified codec as yet, so all be to use said structure to unify codec up to now based on the foregoing description.
Disclosure of the Invention
[technical problem]
In order to address the above problem, the present invention is intended to a kind of equipment and method that is used for unified MPEG-2, MPEG-3 and Video Codec H.264 and so on, and wherein said method and apparatus is by providing similitude, difference and Consideration corresponding brand-new unified codec notion and structure between a kind of and the different video codec to provide.
In addition, target of the present invention also is to provide a kind of method and apparatus that is used for unifying Video Codec, and wherein said method and apparatus can be unified different Video Codecs under the situation of block-based Video Codec not being carried out any function change.
Another object of the present invention provides a kind of by add the method and apparatus that the syntax data abstraction function is unified Video Codec in parsing and entropy decoding processing, and wherein this parsing and entropy decoding processing are the main common components between the different codecs.
Another object of the present invention provides a kind of method and apparatus of unifying Video Codec among the functional unit (FU) that is divided into by the common component with different codecs.
A further object of the present invention provides a kind of unified codec structure, and the functional unit of wherein carrying out parsing and entropy decoding processing all concentrates in this structure based on the functional unit that with the macro block is the processing of unit with those.
Target of the present invention also is to provide a kind of unified codec structure, and wherein this structure can be used for unified other block-based video and image codec except MPEG-2, MPEG-4 and AVC.
Another object of the present invention provides a kind of about the notion of unified Video Codec and the international standard of structure.And other purposes of the present invention will be understood by clear by preferred embodiment described below.
[technical scheme]
In order to realize above-mentioned target, one aspect of the present invention provides a kind of unified codec device.
Unified codec device based on the preferred embodiment of the present invention can comprise: resolve and entropy decoding unit (PEU), the contextual information that is used to extract different codecs produces contextual information and control signal; Block-based decoder's pipeline, this pipeline are based on that block-based processing unit in each codec unifies, and it is used to carrying out coding or decoding processing from the data of described PEU output; And overall control unit (GCU), be used to control the Code And Decode processing of block-based decoder's pipeline, wherein this pipeline is to be grouped according to described processing unit afterwards with each codec and processing are corresponding with contextual information in the control signal that will receive from described PEU.
Control signal can indicate whether to use quantization table, and contextual information can be added when having used quantization table.
GCU can handle control signal and contextual information, and it is delivered to the inverse quantization unit that comprises in the block-based decoder's pipeline.
Unified codec device based on another embodiment of the present invention can comprise: resolve and decoding function unit (PD FU), be used for extracting and dividing into groups to be positioned at according to the different syntax data of each codec contextual information, control signal and the data of the bit stream of input; Based on the functional unit (based on the FU of MB) of macro block, these unit are that the block-based processing unit with each codec serves as that the basis is come by unified, their data from PD FU output that are used to decode; And overall control unit (GCU), be used for the control signal that will receive and contextual information from PD FU with those FU based on MB that are grouped according to processing unit are controlled after each codec and processing are corresponding.
Control signal can indicate whether to have carried out the functional unit that is included in based among the FU of MB, then needs contextual information when carrying out functional unit.
Control signal can comprise AC prediction indication, coded block pattern (CBP), quantization scale (scale), data partition mark, width, highly, short-sighted frequency marking topic mark or its combination.
When can being included in by the control information deixis, contextual information is the needed information of execution function.
GCU can processing control signals and contextual information, and sends it to each functional unit that comprises among the FU based on MB.
PD FU can be used as the assembly of GCU and is involved.
To achieve these goals, another aspect of the present invention provides a kind of method that is used for unified codec.
The method of unified codec can may further comprise the steps according to the preferred embodiment of the invention: extract the syntax data of each different codec from PEU, and produce contextual information and control signal; In the block-based decoder's pipeline that quilt is unified based on the block-based processing unit of each codec, encode or decode carrying out from the data of PEU output; And the control signal that will from described PEU, receive and contextual information and each codec and handle corresponding after, in GCU, the Code And Decode of the block-based decoder's pipeline that is grouped according to processing unit handled and controls.
Control signal can indicate whether to use quantization table, and contextual information can be added when having used quantization table.
GCU can handle control signal and contextual information, and it is submitted to the inverse quantization unit that comprises in the block-based decoder's pipeline.
The method of unified in accordance with another embodiment of the present invention codec can may further comprise the steps: PD FU receives bit stream and extracts and packet context information, control signal and data according to the grammer of each codec; The MB FU unified according to the block-based processing unit of each codec decodes for the data of exporting from PD FU; And at the control signal that will receive and contextual information from PD FU with after each codec and processing are corresponding, GCU controls those decoding processing based on the FU of MB that are grouped according to processing unit.
Control signal can indicate whether to have carried out the functional unit that is included in based among the FU of MB, then needs contextual information when carrying out functional unit.
GCU can processing control signals and contextual information, and sends it to each functional unit that comprises among the FU based on MB.
Accompanying drawing is described
By contrasting following description, accessory claim and accompanying drawing, these and other features, aspect and the advantage that the present invention may be better understood, wherein:
What Fig. 1 showed is the method for handling unified codec according to routine techniques;
Fig. 2 shows is structure according to the unified codec of routine techniques;
What Fig. 3 showed is the structure of unified codec in accordance with a preferred embodiment of the present invention;
The processing method that the quantization table that the basis that is based on a preferred embodiment of the invention that Fig. 4 shows is used in in-line coding is used;
Fig. 5 shows is structure according to the unified codec of another preferred embodiment of the present invention; And
What Fig. 6 showed is data flow and the processing of carrying out between PD functional unit and GCU according to another preferred embodiment of the present invention.
The invention pattern
By here accompanying drawing and description taken in, can know and understand the present invention, service advantages of the present invention and by implementing the target of the present invention or realization.
Hereinafter, the preferred embodiments of the present invention are described in detail with reference to the accompanying drawings.
Fig. 2 is the structure according to the unified codec of routine techniques, and Fig. 3 is the structure of unified codec in accordance with a preferred embodiment of the present invention.
With reference to figure 2, what this figure showed is the structure of the unified codec device of a routine, and wherein unified codec device comprises resolves and entropy decoding unit 200, data reordering unit 210, inverse scan unit 220, contrary DC/AC predicting unit 230, inverse quantization unit 240, inverse transformation block 250, contrary intra-prediction unit 260, decoding sampling memory cell 270 and de-blocking filter unit 280.
The description of being carried out with reference to figure 2 of unifying codec about routine is following carrying out:
Parsing and entropy decoding unit 200 are carried out the entropy decoding processing by resolving each contextual receiver, video bit stream.In above-mentioned Video Codec, this common process is a most important component.But routine techniques is configured to only carry out resolve and the entropy decoding processing.
Data reordering unit 210 re-constructs orderly view data according to whether carried out the data partition function during encoding.Because the sort method of each codec all is different, so the design in this respect of each codec all is different.
Inverse scan unit 220 is counter-rotatings of the sequence of scanning in many ways during encoding, and it can export a value.The direction of scanning is to stipulate according to the distribution of frequency range value before quantification or conversion.In general, employed is zigzag scanning, but also can have the multiple scan method according to codec.
Contrary DC/AC predicting unit 230 is used in MPEG-4.It has used the distribution of DCT coefficient in frequency range to come the predicted picture direction, thereby improves compression efficiency.
Inverse quantization unit 240 has been used the reverse coefficient of DC and AC of the quantization parameter (Q) of appointment during encoding.
Inverse transformation block 250 is reverse parts of conversion process, and wherein view data will be transformed in certain frequency range, and can obtain handling in this frequency range.Process in the processing before inverse quantization unit is handled DC in this unit and the AC coefficient is carried out inverse transformation, and obtains actual pixel value.That is to say that it can become a thresholding with the frequency range value transform.
Contrary intra-prediction unit 260 is used in AVC during in-line coding is handled.It has used as-reduced blocks of data on every side to predict current block, so that the value before will being inverted to through the value of overcompression.Piece value around 270 recoveries of decoding sampling memory cell is so that carry out forecast function.
The piecemeal phenomenon is eliminated in de-blocking filter unit 280.It can reduce the piecemeal phenomenon that may occur and handle sign with module unit in Video Codec.
With reference to figure 3, this figure shows is structure according to unified codec of the present invention, and this codec device comprises resolves and entropy decoding unit (PEU) block-based decoder's pipeline, and overall control unit (GCU).Hereinafter, assembly of the present invention is described by comparing with the routine techniques structure.
Conventional parsing and entropy decoding unit 200 are parts of total, and it only carries out parsing and decoding processing.The present invention then is extended to it big unit, and separates with block-based decoder's pipeline on function and structure.
PEU310 of the present invention extracts data according to different codec syntax, obtains the actual treatment value that each is used entropy coder, and produces the control signal and the contextual information that will send to GCU330.As most basic assembly in the unified codec, PEU can share between different codecs and unified grammer, reduces the unnecessary data redundancy that exists in the block-based decoder's pipeline thus, and allows to implement effective block-based decoding processing.
By use control signal and the syntax data of extracting from PEU310, block-based decoder's pipeline can be that coding or decoding processing are carried out in the basis with the piece storehouse of N * N or N * M unit.Here, N and M can be any natural numbers.
Block-based decoder's pipeline 320 correspondences be the data reordering unit 210, inverse scan unit 220 in the routine techniques, contrary DC/AC predicting unit 230, inverse quantization unit 240, inverse transformation block 250, contrary intra-prediction unit 260, decoding sampling memory cell 270 and de-blocking filter unit 280, but it has a diverse processing procedure.
Different with the routine techniques of dividing according to function, the present invention divides according to processing unit, but will reduce the redundancy of the different assembly of functional similarity processing method thus.In routine techniques, intimate situation will need and the corresponding assembly of different disposal method so if processing method is different.But the present invention can only increase common component by block-based decoder's pipeline 320.
In addition, because intra-prediction unit 260 only is to use for the AVC codec in routine techniques with the sampling memory cell 270 of decoding, therefore when the unification codec, these functions are independent needs.
But, will come block functions based on processing unit based on the decoder's pipeline 320 of determining among the present invention, and only unified be between the S110 of Fig. 1 and the S180 based on the unit of determining, will increase common component thus, and then promote treatment effeciency.
Routine techniques is formed at each and based on the step of function or in handling each codec data is handled.On the other hand, the present invention has comprised independent GCU330, and it controls block-based decoder's pipeline 320 jointly by use treated contextual information in PEU310.
GCU330 of the present invention handles the PEU information that receives from PEU310 and comprised control signal and contextual information.
Fig. 4 is a diagram of describing the processing method of the quantization table application of using based on the basis of a preferred embodiment of the invention in in-line coding.
According to a preferred embodiment of the invention, the control signal 420 among Fig. 4 refers to and shows the value of whether using quantization table, and contextual information 430 refers to the additional information under the situation of using quantization table.
Fig. 5 is based on the structure of the unified codec of another preferred embodiment of the present invention.
As shown in Figure 5, unified codec of the present invention comprise resolve and decoding function unit (PDFU) 510, based on the functional unit (based on the FU of MB) 520 and the overall control unit (GCU) 530 of macro block.Be included in a plurality of functional units among the PD FU and have a small amount of common component between the different codecs, and these functional units can constitute an analytical capabilities unit.In addition, by expanding as the GCU function, these PD FU can be included among the GCU.
Above-mentioned FU carries out is to unify in the codec the similar function of assembly (210～280) based on function to routine, but its effect then is by based on the PD FU510 that handles, clearly divided based on the FU520 of MB and GCU530.
Compare with routine techniques, in the structure of unified codec of the present invention, be easier to insert, revise and delete each FU, then can unify different codecs afterwards.
Conventional parsing and entropy decoding unit 200 are configured to carry out with a kind of sequential organization simply resolve and the entropy decoding processing.But, PD FU510 of the present invention then has been extended to one group of functional unit, for example VLD FU543, RLD FU546 and MBG FU549, what wherein these unit related to is the processing of data parsing, entropy decoding and macroblock size, in addition, PDFU510 of the present invention separates with FU520 based on MB on function and structure.
PD FU510 of the present invention extracts data according to the different grammers of each codec, obtains each entropy coder by the value of actual treatment, and produces control signal and the contextual information that sends to GCU530.The most basic assembly when PD FU510 is the unification codec can reduce the unnecessary data redundancy that exists among the FU520 based on MB, and can realize effective block-based decoding processing thus.
In addition, PD FU510 can be manufactured into an analytical capabilities unit (PFU), and it can carry out the function of each FU jointly under the situation that is not grouped into above-mentioned a plurality of FU.
Can general Video Codec be processed into Unit 16 * 16 based on macro block by using control signal that PD FU510 produces and syntax data based on the FU520 of MB.Certainly MBFU520 also can be decoded into based on the N * N that determines or N * M unit, and wherein N and M are any natural numbers.
MB FU520 can be considered to corresponding to the data reordering unit 210 in the unified codec structure of routine techniques, inverse scan unit 220, contrary DC/AC predicting unit 230, inverse quantization unit 240, inverse transformation block 250, contrary intra-prediction unit 260, decoding sampling memory cell 270 and de-blocking filter unit 280.
With convenience of system design to be listed in preferential conventional system different, the present invention has been by having carried out revising or replenishing to functional unit based on the packet transaction of function and processing, and this modification or replenish is easy to by guaranteeing fully that when creating unified codec the independence of each functional unit finishes.
Although there is functional similarity, but routine techniques need be used for the different assemblies of different codecs, and the present invention then can come in the codec by realizing similar function based on a functional unit among the FU of MB by different codecs are incorporated in.
In addition, as shown in Figure 5, FU520 based on MB can comprise DCR FU533, ISFU556, IAP FU599, IQ FU563 and IT FU566, and in the process of unified codec, and be easy to insertion in based on the FU520 of MB, interpolation, modification or deletion functional unit based on macro block.
In routine techniques, contrary 260 of intra-prediction unit are used in the AVC codec, and when the unification codec, its function is as being needed separately based on the additional function among the FU of MB.
FU520 based on MB among the present invention comes functional unit is divided into groups based on function, and increased the public function unit between the S110 and S180 in Fig. 1 routine techniques, the simplification that has promoted treatment effeciency thus and revised, add, insert codec afterwards.
Routine techniques is configured to the step of each function grouping of individual processing or the codec data in the assembly.But independent by comprising (3CU530, the present invention have been configured to by being to use the contextual information handled in PD FU510 and control signal to control FU520 based on MB jointly.
That is to say that GCU530 of the present invention handles the control signal and the contextual information that receive from PD FU510, and by using treated control signal to control FU520 based on MB.
Fig. 6 is data flow and the processing of carrying out between PD FU510 and GCU530 according to another preferred embodiment of the present invention.In other words, Fig. 6 shows is to be the data flow and the processing of the processing that unit implemented by the received code bit stream and with the macro block between PD FU510 and GCU530.
According to present embodiment, detailed control signal and contextual information 610 can comprise width, highly, coding tile patterns (CPB), quantization scale, data partition mark, short-sighted frequency marking topic mark, AC predictive marker and inner VLC threshold value.
VLD functional unit 543 converts a part of bit stream (for example some heading message) to be sent to GCU530 detailed control signal and contextual information, and it also sends to RLD functional unit 546 with DC coefficient 620 in the bit stream and AC coefficient symbols 630 in addition.
AC value of symbol in the data message 620,630 that RLD functional unit 546 will receive from VLD functional unit 543 converts significant data to, and send it to MBG functional unit 549, to be unit with the macro block send to FU520 based on MB with DC and AC information for 549 of this unit.
Though be to describe with reference to MPBG-2, MPEG-4 and AVC to be used for video and to unify the equipment of codec and method hereinbefore, but clearly, under not to other videos with block-based decoder's pipeline or situation that image codec limits, described equipment and method are suitable for equally.
Accompanying drawing and detailed description are example of the present invention, and they only are used to describe the present invention, and can not limit or retrain scope of the present invention.Thus, anyone of this area or those of ordinary skill should be appreciated that numerous changes and other embodiment are possible.True scope of the present invention is only defined by the spirit of accessory claim.
Industrial usability
As mentioned above, the method and apparatus for unified Video Codec can lead among the present invention Cross provide with different video codec between similitude, difference and Consideration corresponding Brand-new concept and the unified codec of structure unify MPEG-2, MPEG-4 and H.264 (AVC) and so on Video Codec. Conventional codec is absorbed in each codec The design convenience, the present invention has then introduced and has resolved and decoding function is divided into groups and based on macro block The function grouping, and by coming packet transaction according to function and carrying out by overall control module Process, thus unnecessary or redundant assembly is reduced to minimum.
In addition, the present invention can also carry out any in the function to block-based Video Codec not Unified different codec in the situation of change.
The present invention can also be single by the common component between the different codecs being grouped into function Unit and unified codec effectively.
The present invention can also realize a kind of unified codec structure, and wherein this structure has been assembled usefulness Resolve and the functional unit of decoding function and the merit of carrying out processing take macro block as unit in carrying out Can the unit.
In addition, unified video in the module unit that is being different from MPEG-2, MPEG-4 and AVC Or image codec is when processing, the present invention be can be in without any the situation of restriction by should With.
Claims (15)
1. unified codec device comprises:
(a) resolve and entropy decoding unit (PEU), the contextual information that is used to extract different codecs produces contextual information and control signal;
(b) block-based decoder's pipeline, this pipeline are based on the block-based processing unit of each codec and by unified, it is used to carry out coding or decoding from the data of described PEU output; And
(c) overall control unit (GCU), be used to control the Code And Decode of block-based decoder's pipeline, wherein this pipeline is to be grouped according to described processing unit afterwards with each codec and processing are corresponding with contextual information in the control signal that will receive from described PEU.
2. unified codec device as claimed in claim 1, wherein said control signal indicates whether to use quantization table, and contextual information is added when using quantization table.
3. unified codec device as claimed in claim 2, wherein said GCU handles described control signal and described contextual information, and is delivered to the inverse quantization unit that comprises in the described block-based decoder's pipeline.
4. method that is used for unified codec comprises step:
(a) from PEU, extract the syntax data of each different codec, and produce contextual information and control signal;
(b) in the block-based decoder's pipeline that quilt is unified based on the block-based processing unit of each codec, encode or decode carrying out from the data of described PDU output; And
(c) the control signal that will from described PEU, receive and contextual information and each codec and handle corresponding after, in GCU, the Code And Decode of the block-based decoder's pipeline that is grouped according to described processing unit handled and controls.
5. method as claimed in claim 4, wherein said control signal indicates whether to use quantization table, and contextual information is added when using quantization table.
6. method as claimed in claim 5, wherein said GCU handles described control signal and contextual information, and is delivered to the inverse quantization unit that comprises in the described block-based decoder's pipeline.
7. unified codec device comprises:
(a) resolve and decoding function unit (PD FU), be used for extracting and dividing into groups to be positioned at contextual information, control signal and the data of the bit stream that is transfused to according to the different syntax data of each codec;
(b) based on the functional unit (based on the FU of MB) of macro block, these unit be based on the block-based processing unit of each codec by unified, their data that are used to decode from described PD FU output; And
(c) overall control unit (GCU), be used for the control signal that will receive and contextual information from PD FU with the FU based on MB that is grouped according to described processing unit is controlled after each codec and processing are corresponding.
8. unified codec device as claimed in claim 7, wherein said control signal indicates whether to carry out the functional unit that is included in based among the FU of MB, and needs described contextual information when carrying out described functional unit.
9. unified codec device as claimed in claim 8, wherein said control signal comprise AC prediction indication, coded block pattern (CBP), quantization scale, data partition mark, width, highly or short-sighted frequency marking topic mark or its combination.
10. unified codec device as claimed in claim 8, wherein said contextual information are included in and will be the needed information of execution function when described control information indication will be carried out a function.
11. unified codec device as claimed in claim 8, wherein said GCU handles described control signal and contextual information, and sends among the described FU based on MB and comprise each functional unit.
12. unified codec device as claimed in claim 7, wherein said PD FU is involved as the assembly of described GCU.
13. a method that is used for unified codec comprises step:
(a) PD FU receives bit stream and extracts and packet context information, control signal and data according to the grammer of each codec,
(b) decoded to carrying out by unified MB FU based on the block-based processing unit of each codec from the data of described PD FU output; And
(c) at the control signal that will receive and contextual information from described PD FU with after each codec and processing are corresponding, GCU controls the decoding based on the FU of MB that is grouped according to described processing unit.
14. as the method for claim 13, wherein said control signal indicates whether to carry out the functional unit that comprises among the FU based on MB, and needs described contextual information when carrying out described functional unit.
15. as the method for claim 13, wherein said GCU handles described control signal and contextual information, and sends to each functional unit that comprises among the described FU based on MB.
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| KR1020040084939A KR101059991B1 (en) | 2004-10-22 | 2004-10-22 | Video encoding / decoding device and method |
| KR1020040084939 | 2004-10-22 | ||
| KR1020050003947 | 2005-01-14 |
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| CN101084677A true CN101084677A (en) | 2007-12-05 |
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| KR101444907B1 (en) * | 2008-06-24 | 2014-10-01 | (주)휴맥스 홀딩스 | Reconfigurable AVC Adaptive Video Decoder and Method thereof |
| KR100970145B1 (en) * | 2008-07-18 | 2010-07-14 | (주)휴맥스 | Device and Method for encoding/decoding |
| KR101870940B1 (en) | 2016-04-15 | 2018-06-27 | 한국인스팜(주) | health food composition for improving andropause syndrome |
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Effective date of registration: 20140922 Address after: Gyeonggi Do, South Korea Applicant after: HUMAX CO., LTD. Address before: Gyeonggi Do, South Korea Applicant before: Humax Co., Ltd. |
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Application publication date: 20071205 |