Signal processor and signal processing method

Patent metadata

Field	Value
Publication number	US-2022012090-A1
Application number	US-202117482677-A
Country	US
Kind code	A1
Filing date	Sep 23, 2021
Priority date	Apr 5, 2019
Publication date	Jan 13, 2022
Grant date	—

Abstract

A signal processor and a signal processing method thereof. The signal processor obtain a first audio signal of a first channel, obtains a second audio signal of a second channel. The signal processor performs a first signal processing on the input first audio signal. The signal processor, when it does not obtain the second audio signal, performs a second signal processing on the input first audio signal having undergone the first signal processing and output a further processed first audio signal.

First claim

What is claimed is:

1 . A signal processor comprising:
a memory storing instructions; and a processor that implements the stored instructions to execute a plurality of tasks, including: a first input task configured to obtain a first audio signal of a first channel; a second input task configured to obtain a second audio signal of a second channel; a first signal processing task configured to perform a first signal processing on the input first audio signal and output a processed first audio signal; a second signal processing task configured to perform a second signal processing on the input second audio signal; and a control task configured to, in a case where the second input task does not obtain the second audio signal, cause the second signal processing task to perform the second signal processing on the processed first audio signal and output a further processed first audio signal by automatically outputting the processed first audio signal to the second signal processing performed by the second signal processing task.

2 . The signal processor according to claim 1 , wherein the plurality of tasks further include:
a third input task configured to obtain a third audio signal of a third channel; and a third signal processing task configured to perform a third signal processing on the input third audio signal, wherein the control task, in a case where the third input task does not obtain the third audio signal, causes the third signal processing task to perform the third signal processing on the further processed first audio signal by automatically outputting the further processed first audio signal to the third signal processing performed by the third signal processing task.

3 . The signal processor according to claim 1 , wherein the plurality of tasks further include an object processing task configured to extract an audio signal of each object from contents data and assign the extracted audio signal of each object to the first channel or the second channel.

4 . The signal processor according to claim 3 , wherein the plurality of tasks further include a localization processing task configured to perform sound image localization of each object based on position data indicating a position of the respective object obtained by the object processing task.

5 . The signal processor according to claim 1 , wherein a kind of the first signal processing is the same as that of the second signal processing.

6 . The signal processor according to claim 1 , wherein a kind of the first signal processing is different from that of the second signal processing.

7 . The signal processor according to claim 1 , wherein:
the plurality of tasks further include a temporary storing task configured to temporarily store information in a temporary storage, the control task allocates the temporary storage in advance for a resource of the first signal processing and a resource of the second signal processing.

8 . The signal processor according to claim 1 , wherein the control task causes the first signal processing task and the second signal processing task to perform a plurality of kinds of signal processing.

9 . The signal processor according to claim 1 , further comprising:
a user interface configured to accept a signal input instruction from a user, wherein, upon the user interface accepting the signal input instruction, the control task restricts inputting of the second audio signal for the second signal processing by the second signal processing task, and causes the second signal processing task to perform the second signal processing on the processed first audio signal.

10 . The signal processor according to claim 1 , wherein the first signal processing task performs the first signal processing on the input first audio signal for each frame.

11 . A signal processing method for a signal processor including an input interface for inputting an audio signal, the signal processing method comprising:
obtaining a first audio signal of a first channel input to the input interface; obtaining a second audio signal of a second channel input to the input interface; performing a first signal processing on the input first audio signal and outputting a processed first audio signal; performing a second signal processing on the input second audio signal; and performing, in a case where the second audio signal is not obtained, the second signal processing on the processed first audio signal and outputting a further processed first audio signal by automatically outputting the processed first audio signal to the second signal processing.

12 . The signal processing method according to claim 11 , further comprising:
obtaining a third audio signal of a third channel input to the input interface; performing a third signal processing on the input third audio signal; and performing, in a case where the third audio signal is not obtained, the third signal processing on the further processed first audio signal by automatically outputting the further processed first audio signal to the third signal processing.

13 . The signal processing method according to claim 11 , further comprising:
extracting an audio signal for each object from content data; and assigning the extracted audio signal of each object to the first channel or the second channel.

14 . The signal processing method according to claim 13 , further comprising performing sound image localization of each object based on position data indicating a position of the obtained respective object.

15 . The signal processing method according to claim 11 , wherein a kind of the first signal processing is the same as that of the second signal processing.

16 . The signal processing method according to claim 11 , wherein a kind of the first signal processing is different from that of the second signal processing.

17 . The signal processing method according to claim 11 , further comprising allocating a temporary storage in advance for a resource of the first signal processing and a resource of the second signal processing, to temporarily store information.

18 . The signal processing method according to claim 11 , wherein the first signal processing and the second signal processing each perform a plurality of kinds of signal processing.

19 . The signal processing method according to claim 11 , further comprising:
accepting a signal input instruction by a user using a user interface; and restricting, upon the user interface accepting the signal input instruction, inputting of the second audio signal for the second signal processing, and causing the second signal processing to perform the second signal processing on the processed first audio signal.

20 . The signal processing method according to claim 11 , wherein the second signal processing is performed after performing the first signal processing on the input first audio signal.

Assignees

• Yamaha Corp

Inventors

• Aoki Ryotaro
• Suyama Akihiko
• Fukuyama Tatsuya

Classifications

• G06F9/3836

  Instruction issuing, e.g. dynamic instruction scheduling or out of order instruction execution · CPC title

• G06F3/04883

  for inputting data by handwriting, e.g. gesture or text · CPC title

• G06F9/48 Primary

  Program initiating; Program switching, e.g. by interrupt · CPC title

• H04S2400/11

  Positioning of individual sound objects, e.g. moving airplane, within a sound field (H04S2420/13 takes precedence) · CPC title

• H04S3/00 Primary

  Systems employing more than two channels, e.g. quadraphonic (H04S5/00, H04S7/00 take precedence) · CPC title