DECODING DEVICE, DECODING METHOD, ENCODING DEVICE, ENCODING METHOD, AND PROGRAM

• US 20140214432A1
• Filed: 06/24/2013
• Published: 07/31/2014
• Est. Priority Date: 07/02/2012
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Hatanaka, Mitsuyuki, Chinen, Toru
• Granted Patent: US 10,083,700 B2
• Time in Patent Office: Days
• US Class Current: 704/500
• 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: H04S 2400/03 Aspects of down-mixing multi-channel audio to configurations with lower numbers of playback channels, e.g. 7.1 -> 5.1 H04S2400/01 takes precedence
• CPC Class Codes: H04S 3/008 in which the audio signals are in digital form, i.e. employing more than two discrete digital channels data reduction aspects thereof based on psychoacoustics G10L19/02

Abstract

The present technique relates to a decoding device, a decoding method, an encoding device, an encoding method, and a program which can obtain a high-quality realistic sound.

The encoding device stores speaker arrangement information in a comment region in a PCE of an encoded bit stream and stores a synchronous word and identification information in the comment region such that other public comments and the speaker arrangement information stored in the comment region can be distinguished from each other. When an encoded bit stream is decoded, it is determined whether the speaker arrangement information is stored on the basis of the synchronous word and the identification information stored in the comment region. Audio data included in the encoded bit stream is output according to the arrangement of the speakers corresponding to the determination result. The present technique can be applied to an encoding device

Claims

1. A decoding device comprising:

an identification information detection unit that reads identification information for identifying whether predetermined information is present from a region which can store arbitrary data of an encoded bit stream; and

a reading unit that reads the predetermined information from the region which can store the arbitrary data on the basis of a plurality of the identification information items.

2. The decoding device according to claim 1,

wherein first predetermined identification information and second identification information which is calculated on the basis of the predetermined information are stored as the identification information in the region which can store the arbitrary data.

3. The decoding device according to claim 2,

wherein the reading unit determines that the predetermined information is valid information when the first identification information included in the region which can store the arbitrary data is predetermined specific information and the second identification information read from the region which can store the arbitrary data is identical to the second identification information which is calculated on the basis of the read predetermined information.

4. The decoding device according to claim 3,

wherein, when the read first identification information is the predetermined specific information, the reading unit starts to read the predetermined information that is arranged following the first identification information in the region which can store the arbitrary data.

5. The decoding device according to claim 4,

wherein the second identification information is calculated on the basis of information obtained by performing byte alignment for information including the predetermined information.

6. The decoding device according to claim 5,

wherein an arbitrary number of the predetermined information items in a predetermined range are included in the region which can store the arbitrary data, and

the reading unit determines that the predetermined information is invalid information when the information obtained by the byte alignment does not have a predetermined size.

7. The decoding device according to claim 6,

wherein the predetermined information is information related to audio data, and

the decoding device further includes a decoding unit that decodes the audio data included in the encoded bit stream.

8. A decoding method comprising:

a step of reading identification information for identifying whether predetermined information is present from a region which can store arbitrary data of an encoded bit stream; and

a step of reading the predetermined information from the region which can store the arbitrary data on the basis of a plurality of the identification information items.

9. A program that causes a computer to perform a process comprising:

a step of reading identification information for identifying whether predetermined information is present from a region which can store arbitrary data of an encoded bit stream; and

a step of reading the predetermined information from the region which can store the arbitrary data on the basis of a plurality of the identification information items.

10. An encoding device comprising:

an encoding unit that encodes a plurality of identification information items for identifying whether predetermined information is present and the predetermined information; and

a packing unit that stores the encoded predetermined information and the encoded identification information in a region which can store arbitrary data and generates an encoded bit stream.

11. The encoding device according to claim 10,

wherein first predetermined identification information and second identification information which is calculated on the basis of the predetermined information are stored as the identification information in the region which can store the arbitrary data.

12. The encoding device according to claim 11,

wherein the predetermined information is determined to be valid information when the first identification information included in the region which can store the arbitrary data is the predetermined specific information and the second identification information read from the region which can store the arbitrary data is identical to the second identification information which is calculated on the basis of the read predetermined information.

13. The encoding device according to claim 12,

wherein the predetermined information is arranged following the first identification information in the region which can store the arbitrary data, and

the predetermined information starts to be read when the read first identification information is the predetermined specific information.

14. The encoding device according to claim 13,

wherein information for instructing the execution of byte alignment for information including the predetermined information and information for instructing comparison between the second identification information which is calculated on the basis of information obtained by the byte alignment and the second identification information stored in the region which can store the arbitrary data are further stored in the region which can store the arbitrary data.

15. The encoding device according to claim 14,

wherein an arbitrary number of the predetermined information items in a predetermined range are stored in the region which can store the arbitrary data, and

the predetermined information is determined to be invalid information when the information obtained by the byte alignment does not have a predetermined size.

16. The encoding device according to claim 15,

wherein the predetermined information is information related to audio data,

the encoding unit encodes the audio data, and

the packing unit stores the encoded audio data in the encoded bit stream.

17. An encoding method comprising:

a step of encoding a plurality of identification information items for identifying whether predetermined information is present and the predetermined information; and

a step of storing the encoded predetermined information and the encoded identification information in a region which can store arbitrary data and generating an encoded bit stream.

18. A program that causes a computer to perform a process comprising:

a step of encoding a plurality of identification information items for identifying whether predetermined information is present and the predetermined information; and

a step of storing the encoded predetermined information and the encoded identification information in a region which can store arbitrary data and generating an encoded bit stream.