CN101420624B - Video decoding error handling method and device - Google Patents
Video decoding error handling method and device Download PDFInfo
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- CN101420624B CN101420624B CN 200810217419 CN200810217419A CN101420624B CN 101420624 B CN101420624 B CN 101420624B CN 200810217419 CN200810217419 CN 200810217419 CN 200810217419 A CN200810217419 A CN 200810217419A CN 101420624 B CN101420624 B CN 101420624B
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Abstract
The embodiment of the invention provides a processing method of a video decoding error. The method comprises the following steps: judging whether a syntactic element of an error is provided with an error detection tag when the syntactic element is found wrong, if yes, searching an error processing tag of the syntactic element of the error; and correcting the syntactic element of the error according to the error processing tag of the syntactic element obtained by search. The embodiment of the invention further provides a processing device of the video decoding error. The device searches whether each syntactic element is provided with the error detection tag, and if yes, the device continues searching a processing proposal thereof and corrects the error of the syntactic element according to the processing proposal thereof, thus enhancing the error correction flexibility and the error detection sensitivity.
Description
Technical field
The present invention relates to the video technique field, relate in particular to a kind of video decoding error handling method and device.
Background technology
Entropy coding is the present extensive syntactic element encoding scheme of employing of each video compression protocols institute; This coding method is through using the method for Huffman or arithmetic coding; Each syntactic element is become the binary character string, thereby realized the mapping of syntactic element to binary code stream.
The entropy decoding is the inverse process with respect to entropy coding, realizes that promptly the codeword decoding from code stream recovers the process of syntactic element symbols value, and decoding end recovers corresponding syntax element value according to the mapping relations of syntactic element and binary code stream, thereby realizes decoding.
Because a variety of causes such as Channel Transmission; Error of transmission takes place in transmission course easily; Therefore thereby make decoding end can not correctly recover correct syntactic element, thereby cause decoding error how to find as early as possible that code stream makes mistakes; Be the video decode error-check, the problem that each decoder all need be solved.
For some syntactic element, under each video protocols, all there is certain scope [A, B], after accomplishing syntactic element of decoding, not in [A, B] if the scope of finding decoding back value then can be thought the code stream mistake has taken place.
For the mistake of syntactic element, its prior art is as long as find mistake, and directly improper value being degenerated is processed into right value, for example, if decoded value is less than A then directly be processed into A, if decoded value is greater than B then directly be processed into B.
In realizing process of the present invention; The inventor finds to have following problem in the prior art at least: the flexibility of error correction is not high; Mistake appears in some syntactic element not to be influenced and decodes correct images; These mistakes there is no need to carry out error correction, and the error detection insufficient sensitivity, the fault processing mode is too oversimplified.
Summary of the invention
The embodiment of the invention provides a kind of video decoding error handling method and device, improves the flexibility and the error detection sensitivity of error correction.
Embodiment of the present invention provides a kind of video decode error-detecting method, comprising:
After finding the syntactic element mistake, judge whether the syntactic element of said mistake has the error detection sign,, then inquire about the fault processing sign of the syntactic element of said mistake if having;
According to the fault processing sign of the syntactic element of said inquiry, correct the syntactic element of said mistake.
Embodiment of the present invention also provides a kind of video decode Error Detection Unit, comprising:
Judging unit, whether the syntactic element that is used for the mistake that discriminatory analysis goes out has the error detection sign, if having, then judged result is sent to query unit;
Query unit is used to receive the judged result of said judging unit, inquires about the fault processing sign of the syntactic element of said mistake, and Query Result is sent to error correction unit;
Error correction unit is used to receive the Query Result from query unit, according to the fault processing sign of the syntactic element of said mistake, corrects the syntactic element of said mistake.
Whether the embodiment of the invention has the error correction sign through inquiring about each syntactic element, inquires about its processing scheme if having then continue, and the mistake of said syntactic element is corrected, and has improved flexibility and the error detection sensitivity corrected.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the embodiment of the invention one video decoding error handling method;
Fig. 2 is the schematic flow sheet of the embodiment of the invention two video decoding error handling methods;
Fig. 3 is the structural representation of the embodiment of the invention one video decode error processing apparatus;
Fig. 4 is the structural representation of the embodiment of the invention two video decode error processing apparatus.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and execution mode.Should be appreciated that embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Please refer to Fig. 1, be the schematic flow sheet of the embodiment of the invention one video decoding error handling method, its step specifically comprises:
Step S101: find wrong syntactic element.Because error of transmission takes place, thereby makes decoding end can not recover correct syntactic element, thereby causes decoding error in a variety of causes such as Channel Transmission easily in transmission course.And, under each video protocols, all have certain scope [A, B] for some syntactic element; Behind the syntactic element of having decoded, if the scope of finding decoded value is not in [A, B]; Then think to have taken place the code stream mistake, judge that thus the syntactic element of decoding is wrong.
Step S102: whether the syntactic element of judging said mistake has the error detection sign.Before decoding, the error detection sign of all kinds of syntactic elements that CPU corrects needs, through bus configuration to the register of inside; When finding that syntactic element makes a mistake,, read the register relevant with the classification of said current syntactic element according to the classification of current syntactic element; If this type syntax error needs to correct, then current syntactic element has the error detection sign, carries out step S104; Otherwise do not have the error detection sign, carry out step S103.
Step S103: normal decoder, promptly syntactic element is got actual decode value, is left intact.
Step S104: the fault processing sign of inquiring about the syntactic element of said mistake.Before decoding, CPU is the fault processing of all kinds of syntactic elements mechanism, through bus configuration to a series of registers of inside; When finding that syntactic element makes a mistake,, read specific register according to the classification of current syntactic element; Obtain the value of current syntactic element; Here the value of so-called current syntactic element is being represented a kind of fault processing pattern, and the occurrence of fault processing pattern is different, and its treatment mechanism is also different.
Step S105: the syntactic element of said mistake is carried out error correction according to this fault processing sign; Concrete, according to its treatment mechanism of worth knowledge of the current syntactic element of step S104, thereby make corresponding processing.
Whether the embodiment of the invention has the error detection sign through the query grammar element; If the error detection sign is arranged; Then carry out error correcting through continuing its processing scheme of inquiry; Judge through the error detection sign whether the syntactic element to mistake needs error correction, can not correct, improved the flexibility and the error detection sensitivity of error correction though the wrong syntactic element that video image is not impacted occurs for some thus.
Please refer to Fig. 2, be the schematic flow sheet of the embodiment of the invention two video decoding error handling methods, its step specifically comprises:
Step S201: when resolving code stream, analyze each syntactic element, find wrong syntactic element.Because error of transmission takes place, thereby makes decoding end can not recover correct syntactic element, thereby causes decoding error in a variety of causes such as Channel Transmission easily in transmission course.And, under each video protocols, all have certain scope [A, B] for some syntactic element, behind the syntactic element of having decoded, if the scope of finding decoded value not in [A, B], then thinks to have taken place the code stream mistake.The embodiment of the invention is an example to resolve AVS (Advanced coding of audio and video Standard, the English of the digital audio/video encoding and decoding technique standard that China proposes is called for short) code stream, explains.When resolving the AVS code stream, decoder is resolved each syntactic element one by one according to the regulation of standard.(prediction mode for chroma, be used for representing chrominance block carry out the algorithm of infra-frame prediction) adopts Columbus's coded system to encode because syntactic element intra_chroma_pred_mode, therefore in decoding intra_chroma_pred_mode; Possibly decode and take the post as the meaning value; And agreement is stipulated, the codomain scope of intra_chroma_pred_mode is [0,3]; The value of therefore coming out when decoding is greater than 3 the time; Suppose intra_chroma_pred_mode==5, this moment, Decode engine just can think that code stream has occurred unusually, judged that thus the syntactic element of decoding is wrong.
Step S202: whether the syntactic element of judging said mistake has the error detection sign.Before decoding, the error detection sign of all kinds of syntactic elements that CPU corrects needs, through bus configuration to the register of inside; When finding that this syntactic element intra_chroma_pred_mode makes a mistake,, read the register relevant with its classification according to its classification; If the mistake of syntactic element intra_chroma_pred_mode needs to correct, then have the error detection sign, carry out step S204; If do not have the error detection sign, then carry out step S203.
Step S203: normal decoder; Be that syntactic element intra_chroma_pred_mode gets actual decode value, be left intact.
Step S204: the fault processing sign of inquiring about the syntactic element of said mistake.Before decoding, CPU is the fault processing of all kinds of syntactic elements mechanism, through bus configuration to a series of registers of inside; When finding that syntactic element makes a mistake,, read specific register according to the classification of current syntactic element; Obtain the error_deal_mode (fault processing pattern) of current syntactic element, the occurrence of fault processing pattern is represented a kind of concrete treatment mechanism; Occurrence is different, and its treatment mechanism is also different.When for example arranging error_deal_mode==1, syntactic element is carried out amplitude limit degenerate, just in the agreement legal range, get one near the data of actual value.In the time of error_deal_mode==2, the illegal value that replaces current decoding to come out with the legal value of an acquiescence.In error_deal_mode==3, Decode engine stops the syntactic element decoding, abandons current improper code flow data, searches for next legal bit stream data bag.The embodiment of the invention is example, but is not limited to this with amplitude limit degeneration, default value replacement, the three kinds of treatment mechanisms that stop to decode.
Step S205: the syntactic element of said mistake is carried out error correction according to this fault processing sign; Concrete, different according to the value of the error_deal_mode of the current syntactic element of step S204, carry out different disposal.
For example: during error_deal_mode==1, need carry out amplitude limit and degenerate, the value of syntactic element intra_chroma_pred_mode is updated to 3; During error_deal_mode==2, need carry out default value and replace, the value of intra_chroma_pred_mode is updated to default value; During error_deal_mode==3, need stop decoding, stop decoding this moment, searches for next legal bit stream data bag.
Step S206: the relevant information of syntactic element mistake is reported CPU; Concrete; When finding that syntactic element intra_chroma_pred_mode makes a mistake, the relevant information of decoding device misregistration comprises type of error; Errors present; Treatment mechanism is given the peripheral CPU of decoding device with this information reporting, thereby is made peripheral CPU can obtain the relevant information of code stream mistake.
Whether embodiment of the invention query grammar element intra_chroma_pred_mode has the error detection sign; If the error detection sign is arranged; Then carry out error correcting through continuing its processing scheme of inquiry; Judge through the error detection sign whether the syntactic element to mistake needs error correction, can not correct, improved the flexibility and the sensitivity of error detection though the wrong syntactic element that video image is not impacted occurs for some thus; And, thereby realized real-time feedback and statistics to the code stream situation with the CPU that reports of the detailed error situation of syntactic element mistake.
Please refer to Fig. 3, be the structural representation of embodiment of the invention video decode error processing apparatus, said video decode Error Detection Unit comprises code stream analysis unit 31, judging unit 32, query unit 34, error correction unit 35.
Said code stream analysis unit 31 is used for analyzing each syntactic element of video protocols, finds the syntactic element mistake; Because error of transmission takes place, thereby makes decoding end can not recover correct syntactic element, thereby causes decoding error in a variety of causes such as Channel Transmission easily in transmission course.And, under each video protocols, all have certain scope [A, B] for some syntactic element; Behind the syntactic element of having decoded, if the scope of finding decoded value is not in [A, B]; Then think to have taken place the code stream mistake, judge that thus the syntactic element of decoding is wrong.
Said judging unit 32 is used to judge whether the syntactic element of the mistake that said code stream analysis unit 31 is found has the error detection sign; Concrete; According to the classification of the syntactic element of said mistake, read the relevant register of classification with the syntactic element of current mistake, thereby whether the syntactic element of judging said mistake has the error detection sign; If have the error detection sign, then judged result is sent to query unit 34.
Said query unit 34, after being used to receive the judged result of said judging unit 32, inquire about said mistake syntactic element the fault processing sign and Query Result sent to error correction unit 35; Concrete, before decoding, CPU is the fault processing of each syntactic element mechanism; Through bus configuration to a series of registers of inside, when finding that syntactic element makes a mistake, according to the classification of current syntactic element; Read specific register, obtain the value of current syntactic element, the value of so-called current syntactic element is being represented a kind of fault processing pattern here; The occurrence of fault processing pattern is different; Its treatment mechanism is also different, inquire the fault processing sign of current syntactic element after, Query Result is sent to error correction unit 35.
Said error correction unit 35 is used to receive the Query Result from query unit 34, and according to this fault processing sign the syntactic element of said mistake is carried out error correction; Concrete, according to its treatment mechanism of worth knowledge of the current syntactic element of query unit 34, thereby make corresponding processing.
The embodiment of the invention judges through judging unit 32 whether each syntactic element has the error detection sign; If have then continue its processing schemes of inquiry through query unit 34; Correct the mistake of said syntactic element according to its processing scheme by error correction unit 35; Judge that through the error detection sign whether the syntactic element to mistake needs error correction, has improved the flexibility and the error detection sensitivity of error correction.
Please refer to Fig. 4, be the structural representation of embodiment of the invention video decode error processing apparatus, said video decode Error Detection Unit comprises that code stream analysis unit 41, judging unit 42, query unit 43, error correction unit 44 and error message report unit 45.
Said code stream analysis unit 41 is used for analyzing each syntactic element of video protocols, finds the syntactic element mistake; Because error of transmission takes place, thereby makes decoding end can not recover correct syntactic element, thereby causes decoding error in a variety of causes such as Channel Transmission easily in transmission course.And, under each video protocols, all have certain scope [A, B] for some syntactic element; Behind the syntactic element of having decoded, if the scope of finding decoded value is not in [A, B]; Then think to have taken place the code stream mistake, judge that thus the syntactic element of decoding is wrong.
Said judging unit 42 is used to judge whether the syntactic element of the mistake that said code stream analysis unit 41 is found has the error detection sign; Concrete; According to the classification of the syntactic element of said mistake, read the relevant register of classification with the syntactic element of current mistake, thereby whether the syntactic element of judging said mistake has the error detection sign; If have the error detection sign, then judged result is sent to query unit 43.
Said query unit 43, after being used to receive the judged result of said judging unit 42, inquire about said mistake syntactic element the fault processing sign and Query Result sent to error correction unit 44; Concrete, before decoding, CPU is the fault processing of each syntactic element mechanism; Through bus configuration to a series of registers of inside, when finding that syntactic element makes a mistake, according to the classification of current syntactic element; Read specific register, obtain the value of current syntactic element, the value of so-called current syntactic element is being represented a kind of fault processing pattern here; The occurrence of fault processing pattern is different, and its treatment mechanism is also different, for example: the value of current syntactic element==1 o'clock; Need carry out amplitude limit and degenerate, the value of syntactic element is updated to 3; The value of current syntactic element==2 o'clock need be carried out default value and replaced, and the value of current syntactic element is updated to default value; The value of current syntactic element==3 o'clock need stop decoding.After inquiring the fault processing sign of current syntactic element, Query Result is sent to error correction unit 44.
Said error correction unit 44 is used to receive the Query Result from query unit 43, and according to this fault processing sign the syntactic element of said mistake is carried out error correction; Concrete, according to its treatment mechanism of worth knowledge of the current syntactic element of query unit 43, thereby make corresponding processing.
Said error message reports unit 45, is used for the relevant information of syntactic element mistake is reported CPU; Concrete, when finding that syntactic element makes a mistake, the relevant information of misregistration comprises type of error, errors present and treatment mechanism, gives the peripheral CPU of decoding device with this information reporting, thereby makes peripheral CPU can obtain the relevant information of code stream mistake.
The embodiment of the invention judges through judging unit 41 whether each syntactic element has the error detection sign; If have then continue its processing schemes of inquiry through query unit 43; Correct the mistake of said syntactic element according to its processing scheme by error correction unit 44; And report unit 45 that the relevant information of code stream mistake is reported CPU by error message, and make CPU can obtain the relevant information of code stream mistake, improved the flexibility and the error detection sensitivity of error correction.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to accomplish through program; Said program can be stored in the computer read/write memory medium, and said storage medium is ROM/RAM, magnetic disc, CD etc.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (12)
1. a video decoding error handling method is characterized in that, comprising:
After finding the syntactic element mistake, judge whether the syntactic element of said mistake has the error detection sign,, then inquire about the fault processing sign of the syntactic element of said mistake if having; Said error detection sign is used to judge whether the syntactic element to mistake needs error correction; Said fault processing sign is used to represent the fault processing pattern, and the fault processing pattern is different, and treatment mechanism is different;
According to the fault processing sign of the syntactic element of said inquiry, correct the syntactic element of said mistake.
2. the method for claim 1; It is characterized in that: said step finds that the syntactic element mistake comprises: analyze each syntactic element in the code stream according to video protocols; If decoded value in the scope of setting, does not judge that then said syntactic element makes a mistake.
3. the method for claim 1; It is characterized in that: said step is inquired about said syntactic element and whether is had the error detection sign, if having, then inquires about the fault processing sign of said syntactic element; Also comprise: do not have error detection sign, then normal decoder if judge the syntactic element of said mistake.
4. the method for claim 1, it is characterized in that: the fault processing sign of said syntactic element is represented the treatment mechanism for the syntactic element of said mistake.
5. the method for claim 1; It is characterized in that: before decoding, processor is the fault processing of all kinds of syntactic elements mechanism, through bus configuration to the register of inside; The fault processing sign of the syntactic element of the said mistake of said inquiry comprises: when finding that syntactic element makes a mistake; According to the classification of current syntactic element, read the register relevant with the classification of said current syntactic element, obtain the fault processing sign of current syntactic element.
6. the method for claim 1 is characterized in that, also comprises: the error message with the syntactic element of said mistake reports processor.
7. method as claimed in claim 6 is characterized in that, the error message of the syntactic element of said mistake comprises: the type of error of syntactic element, errors present or treatment mechanism.
8. a video decode error processing apparatus is characterized in that, comprising:
Judging unit, whether the syntactic element that is used for the mistake that discriminatory analysis goes out has the error detection sign, if having, then judged result is sent to query unit, and said error detection sign is used to judge whether the syntactic element to mistake needs error correction;
Query unit is used to receive the judged result of said judging unit, inquires about the fault processing sign of the syntactic element of said mistake; Query Result is sent to error correction unit; Said fault processing sign is used to represent the fault processing pattern, and the fault processing pattern is different, and treatment mechanism is different;
Error correction unit is used to receive the Query Result from query unit, according to the fault processing sign of the syntactic element of said mistake, corrects the syntactic element of said mistake.
9. device as claimed in claim 8 is characterized in that, also comprises: the code stream analysis module is used for each syntactic element according to video protocols analysis code stream, if decoded value is then judged said syntactic element mistake not in the scope of setting.
10. device as claimed in claim 8 is characterized in that: the fault processing sign of said syntactic element is represented the treatment mechanism for the syntactic element of mistake.
11. device as claimed in claim 8 is characterized in that, also comprises: error message reports the unit, is used for the error message with said syntactic element, reports processor.
12. device as claimed in claim 11 is characterized in that: said error message comprises type of error, errors present or the treatment mechanism of the syntactic element of said mistake.
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| CN1364031A (en) * | 2001-01-10 | 2002-08-14 | 华为技术有限公司 | Method for processing error codes in compressed coded image transmission |
| JP2006295910A (en) * | 2005-03-16 | 2006-10-26 | Victor Co Of Japan Ltd | Error correction apparatus |
| CN101040445A (en) * | 2005-01-22 | 2007-09-19 | 思科技术公司 | Error protecting groups of data words |
| CN101253775A (en) * | 2005-09-01 | 2008-08-27 | 皇家飞利浦电子股份有限公司 | Method and apparatus for encoding and decoding of video frequency error recovery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1364031A (en) * | 2001-01-10 | 2002-08-14 | 华为技术有限公司 | Method for processing error codes in compressed coded image transmission |
| CN101040445A (en) * | 2005-01-22 | 2007-09-19 | 思科技术公司 | Error protecting groups of data words |
| JP2006295910A (en) * | 2005-03-16 | 2006-10-26 | Victor Co Of Japan Ltd | Error correction apparatus |
| CN101253775A (en) * | 2005-09-01 | 2008-08-27 | 皇家飞利浦电子股份有限公司 | Method and apparatus for encoding and decoding of video frequency error recovery |
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