CN101149962A

CN101149962A - Error correction method for playing view window multimedia audio frequency song in multimedia product

Info

Publication number: CN101149962A
Application number: CNA2006100961610A
Authority: CN
Inventors: 薛亮
Original assignee: WUXI INTECH TECHNOLOGY Co Ltd
Current assignee: Wuxi China Resources Semico Co Ltd
Priority date: 2006-09-22
Filing date: 2006-09-22
Publication date: 2008-03-26

Abstract

The error-correction method for playing WMA songs in multi-media products includes: before unpacking data pack head, firstly search the initial position of the data pack according to condition codes and then unpack the data pack head; detect while unpacking data pack bag head and data frame, if discover an error, return to search the next data bag initial position module until the document ends, but does not exit or end playing program. The data pack occurring error can be skipped, just losing less information, but later documents can be normally played to largely increase the fault-tolerance and error-correction capabilities of multi-media products.

Description

The error correction method of playing view window multimedia audio song in a kind of media product

Affiliated technical field

The present invention relates to a kind of error correction method of the WMA of broadcast song, be meant the error correction method of playing the WMA song in the media product especially.

Background technology

Along with multimedia technology, electronic technology and development of computer, various media products are enriching people's life.And the integrated digital music playback function has become indispensable function in the media product, is all attracting numerous consumers with the integrated digital music playback function as portable product such as multimedia handset, MP3 player, PMP.

WMA is the abbreviation of Windows Media Audio, is the digital music format that Microsoft tries hard to recommend.From the initial stage nineties so far, the most popular digital audio standard of computer user is developed and become to the mp3 audio format, obtained most users' approval, but it is satisfied that the tonequality under high compression rate can not be made us, along with internet and the development of digital audio equipment with oneself, more the cry of high compression rate is also more and more higher to require high tone quality more, after the WMA of Microsoft has appearred, under the condition of identical low bit rate, can reach better effect than mp3.WMA is because wideling popularize and himself advantage of Microsoft more and more is subjected to consumers in general's approval.

Yet present various media products and based on the Computer Music playout software all do not carry out correction process to song in the process of playing the WMA song.When the WMA song files of playing has partial data to lose or when destroyed, general disposal route has two kinds: a kind of is directly to provide error message, supporting paper is destroyed or do not support, does not play this first song; Another just plays the data that the front does not have destruction, when having detected error in data, stops to play and providing error message.

The WMA song data is stored with Advanced Systems Format (ASF).The structure of wma file as shown in Figure 1.

The flow process that common product is play WMA is: carry out the decoding of ASF file header earlier; Then decoded in packet header; To the frame data decoding, in the process of decoding, find mistake then, then stop to play.

There is the defective aspect following two in these class methods when the wma file that broadcast is destroyed: one, just detect file and destroyed, be left intact, whole file all can not be play; Two, play while detecting, stop when wrong playing, can not play even the file data of back is intact like this when detecting.Lost a large amount of useful informations in a word.The typical process of this process as shown in Figure 2.

Summary of the invention

Major defect when playing the WMA song of being destroyed in order to solve common product, the utility model has been developed a kind of error correction method, play aspect the WMA song destroyed at media product, this novel error correction method can make the user to greatest extent enjoy music, make the fault-tolerant and error correcting capability of media product obtain remarkable enhancing.

The technical solution adopted for the present invention to solve the technical problems:

This method is when playing the WMA song, and to having done some pre-service unusually in the playing flow, concrete scheme is as follows: before separating packet header, search the reference position of packet according to condition code earlier, and then separate data packet header; Detecting in the process of separating data packet header and frame data, if find mistake, is not to withdraw from or finish playing program but turn back to search next bag reference position module, up to the end of file.So just can, the packet that makes a mistake is skipped, only lose a little information, but the file that the back is not destroyed still can normal play, has improved the ability of the fault-tolerant and error correction of media product widely.

The invention has the beneficial effects as follows:

Solved the major defect of general media product disposal route when the WMA song that broadcast is destroyed, can make the user when running into the WMA song files and destroyed, enjoy music has improved the ability of the fault-tolerant and error correction of media product to greatest extent.

Description of drawings

Fig. 1 is the wma file structural representation

Fig. 2 is the typical flowchart of the general WMA of broadcast song

Fig. 3 is the WMA playing flow figure with error correction

Embodiment

Fig. 3 is implementing procedure figure of the present invention.

Below in conjunction with Fig. 3 embodiment is described:

1. when playing the WMA song, decoding ASF head obtains wma file for information about earlier;

2. search the reference position in the packet header of next packet, till finding packet header, unless the end of file;

3. decoded data packet header obtains packet for information about, and whether the decoding of judgment data packet header is correct, if correct, enters process 4, otherwise return course 2;

4. decode frame data, and judge whether decoding is correct; If correct, the voice data behind the output decoder is play, and enters process 5 simultaneously; Otherwise return course 2;

5. judge whether the WMA playback of songs finishes,, just finish the played songs flow process if finish, otherwise return course 2.

Claims

1. play the error correction method of WMA song in the media product, it is characterized in that: when playing the WMA song, separate before the data packet header, the reference position of searching packet according to condition code is separated data packet header more earlier at every turn; When decoding, find mistake, then turn back to and search next data packet head module.

2. according to the error correction method of playing the WMA song in the described a kind of media product of claim 1, it is characterized in that: when decoding, find mistake, then turn back to and search next data packet head module, up to the end of file.Like this packet that makes a mistake is skipped, only lost a little information, the file that the back is not destroyed still can normal play.