Method, medium, and apparatus encoding/decoding audio data with extension data

• US 20070083363A1
• Filed: 10/12/2006
• Published: 04/12/2007
• Est. Priority Date: 10/12/2005
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Junghoe, Oh, Eunmi
• Granted Patent: US 8,055,500 B2
• Time in Patent Office: Days
• US Class Current: 704/229
• CPC Class Codes: G10L 19/0017 Lossless audio signal coding; Perfect reconstruction of coded audio signal by transmission of coding error G10L19/24 takes precedence
• CPC Class Codes: G10L 19/008 Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
• CPC Class Codes: G10L 19/24 Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
• CPC Class Codes: G10L 21/038 using band spreading techniques

Abstract

A method, medium, and apparatus encoding/decoding audio data in which audio data is hierarchically encoded, and at least one extension data of the audio data is encoded using at least one encoding method, and decoding is performed in the same manner, thereby ensuring fine grain scalability (FGS) and unlimited extendibility of the audio data.

Claims

1. An encoding method, comprising:

encoding audio data using at least one encoding method; and

encoding at least one extension data for the audio data using at least one encoding method.

2. The encoding method of claim 1, wherein, in the encoding of the audio data, the audio data is hierarchically encoded using a first encoding method, and in the encoding of the at least one extension data, the at least one extension data is encoded using at least one encoding method, including the first encoding method.

3. The encoding method of claim 1, wherein the encoding of the at least one extension data comprises encoding data for extending a channel of the audio data.

4. The encoding method of claim 1, wherein the encoding of the at least one extension data comprises encoding data for extending a bandwidth of the audio data.

5. The encoding method of claim 1, wherein the encoding of the at least one extension data comprises at least one of hierarchically encoding data for extending a channel of the audio data and encoding data for extending a bandwidth of the audio data.

6. The encoding method of claim 1, wherein the encoding of the at least one extension data comprises encoding data for extending a bandwidth of the audio data and encoding a code for checking for transmission errors.

7. The encoding method of claim 1, further comprising generating a code indicating a type of the at least one extension data, wherein the encoding of at the least one extension data is performed using at least one encoding method according to the generated code.

8. The encoding method of claim 7, wherein the type of the at least one extension data is at least one selected from a type of data for extending a channel of the audio data, a type of data for extending a bandwidth of the audio data, a type of data for checking for transmission errors, metadata of the audio data, and a fill element of the audio data.

9. The encoding method of claim 1, further comprising:

generating a first code indicating a start of an encoded portion of the at least one extension data; and

generating a second code indicating a type of the at least one extension data.

10. The encoding method of claim 9, further comprising inserting a third code indicating an end of an encoded portion of the audio data, immediately after the encoded portion of the audio data, wherein the generating of the first code further comprises inserting the first code after the inserted third code, and the generating of the second code further comprises inserting the second code after the inserted first code.

11. The encoding method of claim 9, wherein the first code is a 4-bit code with four consecutive identical bits, and the second code is a different 4-bit code.

12. The encoding method of claim 1, further comprising:

inserting a code indicating a type of different extension data after an encoded portion of the at least one extension data; and

encoding the at least one extension data, wherein the adding of the code and the encoding of the least one extension data are repeatedly performed until all extension data are encoded.

13. At least one medium comprising computer readable code to control at least one processing element to implement the method of claim 1.

14. At least one medium comprising bitstream information to control a decoding apparatus to decode encoded audio data, the bistream comprising the encoded audio data encoded using at least one encoding method, and at least one encoded extension data for the audio data using at least one encoding method.

15. The at least one medium of claim 14, wherein the bitstream information further comprises at least one code with information for any of a start of an encoded portion of the at least one extension data, information identifying a type of the at least one encoded extension data, and information of an end of an encoded portion of the audio data.

16. The at least one medium of claim 15, wherein the code indicating the end of the encoded portion of the audio data immediately follows the encoded portion of the audio data, followed immediately by the code for the start of the encoded portion of the at least one extension data, followed immediately by the code identifying the type of the at least one encoded extension data.

17. An encoding apparatus, comprising:

a first encoding unit to encode audio data using at least one encoding method; and

a second encoding unit to encode at least one extension data for the audio data using at least one encoding method.

18. A decoding method, comprising:

decoding audio data using at least one decoding method; and

decoding at least one extension data for the audio data using at least one decoding method.

19. The decoding method of claim 18, wherein, in the decoding of the audio data, the audio data is hierarchically decoded using a first decoding method, and in the decoding of the at least one extension data, the at least one extension data is decoded using at least one decoding method, including the first decoding method.

20. The decoding method of claim 18, wherein the decoding of the at least one extension data comprises decoding data for extending a channel.

21. The decoding method of claim 18, wherein the decoding of the at least one extension data comprises decoding data for extending a bandwidth of the audio data.

22. The decoding method of claim 18, wherein the decoding of the at least one extension data comprises at least one of hierarchically decoding data for extending a channel of the audio data and decoding data for extending a bandwidth of the audio data.

23. The decoding method of claim 18, wherein the decoding of the at least one extension data comprises decoding data for extending a bandwidth of the audio data and decoding a code for checking for transmission errors.

24. The decoding method of claim 18, further comprising detecting a code indicating a type of the at least one extension data, wherein, when the code indicating the type of the at least one extension data is detected, the decoding of the at least one extension data is performed using at least one decoding method according to the generated code.

25. The decoding method of claim 24, wherein the type of the at least one extension data is at least one selected from a type of data for extending a channel of the audio data, a type of data for extending a bandwidth of the audio data, a type of data for checking for transmission errors of the audio data, metadata of the audio data, and a fill element of the audio data.

26. The decoding method of claim 18, further comprising:

detecting a first code indicating a start of an encoded portion of the at least one extension data; and

detecting a second code indicating a type of the at least one extension data.

27. The decoding method of claim 26, further comprising detecting a third code indicating an end of an encoded portion of the audio data, immediately after the encoded portion of the audio data, wherein the detecting of the first code further comprises detecting the first code after the third code if the third code is detected, and the detecting of the second code further comprises detecting the second code after the first code if the first code is detected.

28. The decoding method of claim 26, wherein the first code is a 4-bit code with four consecutive identical bits, and the second code is a different 4-bit code.

29. The decoding method of claim 18, further comprising:

detecting a code indicating a type of different extension data after an encoded portion of the at least one extension data; and

decoding the at least one extension data using a decoding method according to the detected code if the code indicating the type of the different extension data is detected, wherein the detecting of the code and the decoding of the at least one extension data are repeatedly performed until all of the at least one extension data are decoded.

30. At least one medium comprising computer readable code to control at least one processing element to implement the method of claim 18.

31. A decoding apparatus, comprising:

a first decoding unit to decode audio data using at least one decoding method; and

a second decoding unit to decode at least one extension data for the audio data using at least one decoding method.

32. A encoding method comprising:

encoding an audio data;

generating a code indicating the end of payload of the encoded audio data;

generating a code indicating the start of the payload of an extension data;

generating an extension type or extension types; and

encoding an extension data corresponding to the extension type or extension types;

wherein the extension data is at least one selected from extending the channel of the audio data, extending the bandwidth of the audio data, checking a transmission error.

33. A encoding method comprising:

encoding an audio data;

generating a code indicating the end of payload of the encoded audio data;

generating a code indicating the start of the payload of an extension data;

generating an extension type; and

encoding an extension data corresponding to the extension type;

wherein the extension data is at least one selected from extending the channel of the audio data, extending the bandwidth of the audio data, checking a transmission error, and the generation of the extension type and the encoding an extension data are proceeded repeatedly until all extension datas are encoded.

34. A decoding method comprising:

decoding an audio data;

detecting a code indicating the end of payload of the audio data;

detecting a code indicating the start of the payload of an extension data;

detecting an extension type or extension types; and

decoding an extension data corresponding to the extension type or extension types;

wherein the extension data is at least one selected from extending the channel of the audio data, extending the bandwidth of the audio data, checking a transmission error.

35. A decoding method comprising:

decoding an audio data;

detecting a code indicating the end of payload of the audio data;

detecting a code indicating the start of the payload of an extension data;

detecting an extension type; and

decoding an extension data corresponding to the extension type;

wherein the extension data is at least one selected from extending the channel of the audio data, extending the bandwidth of the audio data, checking a transmission error, and the detection of the extension type and the encoding an extension data are processed repeatedly until all extension datas are decoded.

36. A decoding method comprising:

decoding an audio data;

detecting ‘

zero code’

;

detecting ‘

sync code’

;

detecting ‘

extension type’

; and

decoding an extension data corresponding to ‘

extension type’

;

wherein the extension data is at least one selected from extending the channel of the audio data, extending the bandwidth of the audio data, checking a transmission error.

37. A decoding method comprising:

decoding an audio data;

detecting ‘

zero code’

;

detecting ‘

sync code’

;

detecting ‘

extension type’

; and

decoding an extension data corresponding to ‘

extension type’

;

wherein the extension data is at least one selected from extending the channel of the audio data, extending the bandwidth of the audio data, checking a transmission error, and the detection of the extension type and the encoding an extension data are processed repeatedly until all extension datas are decoded.