Signal processor

• US 6,347,180 B1
• Filed: 12/04/1998
• Issued: 02/12/2002
• Est. Priority Date: 04/06/1997
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Abe, Keiko, Kotani, Hiroki
• Primary Examiner(s): NGUYEN, HUY THANH
• Application Number:
  US09/194,897
• Time in Patent Office: 1,166 Days
• Field of Search: H04/N.592, 386/46, 386/52, 386/95, 386/96, 386/112, 386/109, 386/104, 386/121, 386/125, 386/126, 386/64
• US Class Current: 386/281
• CPC Class Codes: G11B 2220/2525 Magneto-optical [MO] discs
• CPC Class Codes: G11B 2220/41 Flat as opposed to hierarchical combination, e.g. library of tapes or discs, CD changer, or groups of record carriers that together store one title
• CPC Class Codes: G11B 2220/415 Redundant array of inexpensive disks [RAID] systems
• CPC Class Codes: G11B 27/031 Electronic editing of digitised analogue information signals, e.g. audio or video signals
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: H04N 5/222 Studio circuitry; Studio devices; Studio equipment cameras or camera modules comprising electronic image sensors, or control thereof H04N23/00

Abstract

Inputted video signals are highly compressed in a high-compression processing means and the compressed signals are saved in a high-compression system processing means, and the video signals lowly compressed in a low-compression processing means and the compressed signals are saved in a first and a second recording means with separating them according to using frequency. The saved videos in the high-compression system processing means are edited and an executing sequence list showing their executing sequence is formed, and a video signal having a high using frequency is outputted from the first memory means which has a small storage capacity (thus, easily accessible), based on the executing sequence list.

Claims

1. A signal processing unit comprising:

high-compression system processing means for high compression of signals including video signals and for saving said signals; and

low-compressing system processing means for performing one of omitting compression and low compression of said signals including said video signals and for saving said signals, said low-compression system processing means including;

first memory means for storing said signals including said video signals; and

second memory means for storing said signals including said video signals having a lower frequency of use than said signals stored in said first memory means, wherein

said signals are transferred from said first memory means to said second memory means based on a frequency of use.

2. The signal processing unit according to claim 1, wherein said first memory means has a faster access speed for accessing stored signals including picture signals than an access speed of said second memory means.

3. A signal processing unit comprising high-compression processing means for high compression of input signals including video signals and for processing said input signals, and low-compression processing means for performing one of omitting compression and low compression of said input signals including said video signals and for processing said input signals, wherein:

said high-compression processing means includes;

first memory means for storing said input signals including highly-compressed video signals; and

list forming means for editing said input signals stored in said first memory means and for forming lists showing executing sequences of edited signals;

said low-compression processing means includes;

second memory means for storing said input signals including uncompressed video signals and lowly-compressed video signals;

list executing means for outputting said input signals stored in said second memory means based on said lists formed by said list forming means;

third memory means for storing said input signals outputted based on output sequence lists from said list executing means; and

fourth memory means for storing said input signals stored in said second memory means according to a frequency of use for said input signals stored in said second memory means, wherein said input signals stored in said third memory means are outputted.

4. The signal processing unit according to claim 3, further comprising output sequence list forming means for forming output sequence lists showing output sequences of said input signals stored in said third memory means, and wherein said input signals stored in said third memory means are outputted from said third memory means based on said output sequence lists.

5. The signal processing unit according to claim 3, wherein:

said input signals stored in said third memory means are outputted to said fourth memory means according to frequencies of use that are outputted from said third memory means; and

said fourth memory means stores said input signals outputted from said third memory means.

6. The signal processing unit according to claim 3, wherein said fourth memory means stores said input signals including said video signals and outputs stored signals to said second memory means responding to editing requests from said list forming means.