Information processing apparatus and sound processing method

• US 9,386,390 B2
• Filed: 03/20/2014
• Issued: 07/05/2016
• Est. Priority Date: 04/12/2013
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Sumioka, Motoshi, Sasaki, Kazuo, Noda, Masahide, Ohtani, Takeshi
• Primary Examiner(s): Tran, Thang
• Application Number:
  US14/220,833
• Publication Number:
  US 20140307877A1
• Time in Patent Office: 838 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04S 1/00 Two-channel systems H04S5/00, H04S7/00 take 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 2420/01 Enhancing the perception of the sound image or of the spatial distribution using head related transfer functions [HRTF's] or equivalents thereof, e.g. interaural time difference [ITD] or interaural level difference [ILD]
• CPC Class Codes: H04S 7/304 For headphones

Abstract

An information processing apparatus includes a forward deciding unit that makes a decision as to a user'"'"'s forward according to the user'"'"'s orientation information, a sound generating unit that creates sound data assigned to each of virtual sound sources placed in a plurality of directions preset in advance, a compressing unit that performs compression on the created sound data by the sound generating unit in different ways between the created sound data corresponding to the user'"'"'s forward obtained by the forward deciding unit and the created sound data corresponding to a direction other than the user'"'"'s forward, and a communication unit that transmits the compressed sound data by the compressing unit.

Claims

1. An information processing apparatus comprising:

a forward deciding unit that makes a decision as to a user'"'"'s forward according to the user'"'"'s orientation information;

a sound generating unit that creates sound data assigned to each of virtual sound sources placed in a plurality of directions preset in advance;

a compressing unit that performs compression on the created sound data by the sound generating unit in different ways between the created sound data corresponding to the user'"'"'s forward obtained by the forward deciding unit and the created sound data corresponding to a direction other than the user'"'"'s forward; and

a communication unit that transmits the compressed sound data by the compressing unit.

2. The information processing apparatus according to claim 1, wherein the compressing unit performs compression on the created sound data corresponding to the user'"'"'s forward so that a high-frequency component is restorable, and also performs compression on the created sound data corresponding to the direction other than the user'"'"'s forward so that a low-frequency component is restorable.

3. The information processing apparatus according to claim 1, wherein the communication unit uses different communication paths to transmit the compressed sound data corresponding to the user'"'"'s forward and the compressed sound data corresponding to the direction other than the user'"'"'s forward, these compressed sound data items being obtained from the compressing unit.

4. The information processing apparatus according to claim 1, further comprising a sorting unit that sorts the created sound obtained from the sound generating unit data in correspondence to forward information obtained from the forward deciding unit, wherein

the compressing unit performs the compression on each sorted sound data item sorted by the sorting unit in one of the different ways.

5. The information processing apparatus according to claim 1, further comprising an extracting unit, wherein:

the compressing unit separates the created sound data by the sound generating unit in correspondence to all virtual sound sources into a low-frequency component and a high-frequency component and compresses the created sound data of the low frequency component and the created sound data of the high-frequency component;

the extracting unit extracts the created sound data of the high frequency component that corresponds to the user'"'"'s forward from the compressed sound data, obtained from the compressing unit, of the high-frequency component; and

the communication unit transmits all compressed sound data of the low frequency component, the compressed sound data having been compressed by the compressing unit, and also transmits the compressed sound data of the high-frequency component, the extracted sound data by the extracting unit and corresponding to the user'"'"'s forward.

6. The information processing apparatus according to claim 1, wherein the forward deciding unit selects at least one virtual sound source closest to the user'"'"'s forward with reference to the user'"'"'s orientation information and placement information in which a position of the virtual sound source has been set in advance.

7. The information processing apparatus according to claim 1, further comprising a control unit that controls coding information and a coding parameter that are used for compression of the created sound data corresponding to the user'"'"'s forward obtained from the forward deciding unit and for compression of the created sound data corresponding to the direction other than the user'"'"'s forward.

8. A sound processing method, performed by an information processing apparatus, comprising steps of:

making a decision as to a user'"'"'s forward according to the user'"'"'s orientation information,

creating sound data assigned to each of virtual sound sources placed in a plurality of directions preset in advance,

performing compression on the created sound data in different ways between the created sound data corresponding to the user'"'"'s forward and the created sound data corresponding to a direction other than the user'"'"'s forward, and

transmitting the compressed sound data compressed in the different ways.

9. A non-transitory computer-readable storage medium in which a program has been recorded to cause a computer to

make a decision as to a user'"'"'s forward according to the user'"'"'s orientation information,

create sound data assigned to each of virtual sound sources placed in a plurality of directions preset in advance,

perform compression on the created sound data in different ways between the created sound data corresponding to the user'"'"'s forward and the created sound data corresponding to a direction other than the user'"'"'s forward, and

transmit the compressed sound data in the different ways.