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

• US 20140156289A1
• Filed: 06/24/2013
• Published: 06/05/2014
• 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 9,542,952 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: G10L 19/167 Audio streaming, i.e. formatting and decoding of an encoded audio signal representation into a data stream for transmission or storage purposes
• 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 2400/11 Positioning of individual sound objects, e.g. moving airplane, within a sound field H04S2420/13 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:

a decoding unit that decodes audio data included in an encoded bit stream;

a reading unit that reads sound source position information about a height of a sound source of the audio data from a region which can store arbitrary data of the encoded bit stream; and

an output unit that outputs the decoded audio data on the basis of the sound source position information.

2. The decoding device according to claim 1,

wherein the sound source position information is information indicating that the height of the sound source is substantially equal to a height of a user, is greater than the height of the user, or is less than the height of the user.

3. The decoding device according to claim 2,

wherein identification information for identifying whether the sound source position information is present is stored in the region which can store the arbitrary data, and

the reading unit reads the sound source position information on the basis of the identification information.

4. The decoding device according to claim 3,

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

5. The decoding device according to claim 4,

wherein the reading unit determines that the sound source position information is valid 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 sound source position information.

6. The decoding device according to claim 5,

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

7. A decoding method comprising:

a step of decoding audio data included in an encoded bit stream;

a step of reading sound source position information about a height of a sound source of the audio data from a region which can store arbitrary data of the encoded bit stream; and

a step of outputting the decoded audio data on the basis of the sound source position information.

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

a step of decoding audio data included in an encoded bit stream;

a step of reading sound source position information about a height of a sound source of the audio data from a region which can store arbitrary data of the encoded bit stream; and

a step of outputting the decoded audio data on the basis of the sound source position information.

9. An encoding device comprising:

an acquisition unit that acquires sound source position information about a height of a sound source;

an encoding unit that encodes audio data and the sound source position information; and

a packing unit that stores the encoded sound source position information in a region which can store arbitrary data and generates an encoded bit stream including the encoded audio data and the encoded sound source position information.

10. The encoding device according to claim 9,

wherein the sound source position information is information indicating that the height of the sound source is substantially equal to a height of a user, is greater than the height of the user, or is less than the height of the user.

11. The encoding device according to claim 10,

wherein the sound source position information and identification information for identifying whether the sound source position information is present are stored in the region which can store the arbitrary data.

12. The encoding device according to claim 11,

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

13. The encoding device according to claim 12,

wherein information for instructing the execution of byte alignment for information including the sound source position 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.

14. An encoding method comprising:

a step of acquiring sound source position information about a height of a sound source;

a step of encoding audio data and the sound source position information; and

a step of storing the encoded sound source position information in a region which can store arbitrary data and generating an encoded bit stream including the encoded audio data and the encoded sound source position information.

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

a step of acquiring sound source position information about a height of a sound source;

a step of encoding audio data and the sound source position information; and

a step of storing the encoded sound source position information in a region which can store arbitrary data and generating an encoded bit stream including the encoded audio data and the encoded sound source position information.