Digital signal processing apparatus and digital signal processing method

• US 7,197,093 B2
• Filed: 07/21/2004
• Issued: 03/27/2007
• Est. Priority Date: 09/01/1999
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Koyata, Tomohiro
• Primary Examiner(s): Ghayour; Mohammed
• Assistant Examiner(s): Ghulamali; Qutub
• Application Number:
  US10/895,072
• Publication Number:
  US 20040268203A1
• Time in Patent Office: 979 Days
• Field of Search: 375/316, 375/340, 375/341, 375/342, 375/272, 375/296, 375/356, 375/232, 375/324, 375/229, 375/231, 370/519, 370/513, 704/212, 704/222, 704/350, 704/500, 704/504
• US Class Current: 375/340
• CPC Class Codes: G10L 19/0208 Subband vocoders
• CPC Class Codes: G10L 21/0364 for improving intelligibility

Abstract

A digital signal of which input data has been segmented as block each having a predetermined data amount and highly efficiently encoded along with an adjacent block is decoded, edited, and then highly efficiently encoded. A delay that takes place in such signal processes is compensated. Thus, part of a digital signal that has been highly efficiently encoded digital signal can be edited.

Claims

1. A digital signal processing apparatus for processing an input digital signal that has been segmented as blocks each having a predetermined data amount and highly efficiently encoded along with adjacent blocks in a predetermined format, comprising:

decoding means for decoding the highly efficiently encoded digital signal along with adjacent blocks encoded in the predetermined format;

modifying process means for modifying the decoded digital signal;

delay compensating means for compensating a delay of the decoded signal decoded by said decoding means and modified by said modifying process means; and

encoding means for highly efficiently encoding the modified and delay compensated digital signal along with adjacent blocks into the predetermined format,

wherein the input digital signal that has been highly efficiently encoded is read from a record medium, and

wherein a delay of the digital signal that has been highly efficiently encoded by said encoding means is compensated by said delay compensating means and then the delay compensated signal is written to the record medium so that the phase of the compensated digital signal matches the phase of the digital signal that has been read from the record medium.

2. The digital signal processing apparatus as set forth in claim 1,

wherein said decoding means decodes the digital signal corresponding to an information compressed parameter for each block.

3. The digital signal processing apparatus as set forth in claim 1, further comprising:

operating means for allowing the user to designate a highly efficiently encoded digital signal to be edited.

4. A digital signal processing method for processing an input digital signal that has been segmented as blocks each having a predetermined data amount and highly efficiently encoded along with adjacent blocks in a predetermined format, comprising the steps of:

(a) decoding the highly efficiently encoded digital signal along with adjacent blocks encoded in the predetermined format;

(b) modifying the decoded digital signal;

(c) compensating a delay of the modified and decoded digital signal; and

(d) highly efficiently encoding the modified and delay compensated digital signal along with adjacent blocks into the predetermined format,

wherein the input digital signal that has been highly efficiently encoded is read from a record medium, and

wherein a delay of the input digital signal that has been highly efficiently encoded is compensated by said compensating a delay and then the delay compensated digital signal is written to the record medium so that the phase of the compensated signal matches the phase of the digital signal that has been read from the record medium.

5. The digital signal processing method as set forth in claim 4,

wherein step (a) is performed by decoding the digital signal corresponding to an information compressed parameter for each block.

6. The digital signal processing method as set forth in claim 4, further comprising the step of:

(e) allowing the user to designate a highly efficiently encoded digital signal to be edited.