Data compression device of digital recording sytem and controlling method thereof

• US 20050084172A1
• Filed: 04/07/2004
• Published: 04/21/2005
• Est. Priority Date: 03/09/2000
• Status: Active Grant

• Current Assignee: Hanwha Vision Company Limited (Hanwha Corporation)
• Original Assignee: Samsung Techwin Corporation (Hanwha Corporation)
• Inventors: Lee, Jae-Hoon
• Granted Patent: US 7,454,072 B2
• Time in Patent Office: Days
• US Class Current: 382/249
• CPC Class Codes: G06T 7/262 using transform domain methods, e.g. Fourier domain methods
• CPC Class Codes: H04N 19/503 involving temporal prediction adaptive coding with adaptive selection between spatial and temporal predictive coding H04N19/107; adaptive coding with adaptive selection among a plurality of temporal predictive coding modes H04N19/109
• CPC Class Codes: H04N 19/619 the transform being operated outside the prediction loop
• CPC Class Codes: H04N 19/63 using sub-band based transform, e.g. wavelets
• CPC Class Codes: H04N 19/99 involving fractal coding
• CPC Class Codes: H04N 9/8042 involving data reduction

Abstract

Disclosed is an input image data compressor which comprises an image recording controller for generating image information on respective input objects from the input image data, generating image information on a moving object using the image information, comparing the previously input image data with the presently input image data, generating new image information on the moving object and compressing the new image information; a storage unit for storing signals or data generated during compression operation of the image recording controller in a corresponding established address; and a compressed image storage unit for storing the compressed image data compressed by the control operation of the image recording controller.

Claims

1-14. -14. (canceled)

15. A data compression controller, comprising:

a photographing unit for photographing an image of a subject using a pickup device unit and outputting corresponding image signals;

an image signal processor for performing image processing on the image signals output by the photographing unit and outputting corresponding image data;

a sound detector for detecting sound and outputting corresponding signals;

a data recording controller for compressing the image data output by the image signal processor when the sound is determined to be generated by the signal output by the sound detector; and

a compressed image storage unit for storing the compressed images output by the data recording controller.

16. The controller of claim 15, wherein the data recording controller determines, when a sound is generated by a signal output by the sound detector, whether the generated sound is greater than a predetermined size, and when the generated sound is greater than the predetermined size, the data recording controller compares the image data of the previous frame with the image data of the preset frame and determines whether the image data are changed, and when changes between the image data of the previous and present frames are generated, performs a high quality compression.

17. A data compression control method comprising:

(a) determining whether a sound is generated by a sound detecting signal;

(b) performing a compression control on input image data when it is determined that the sound is generated; and

(c) not performing the compression control on the input image data when the sound is not generated.

18. The method of claim 17, wherein (b) further comprises:

comparing the size of the generated sound with an established size;

comparing, when the size of the compared sound is greater than the established value, the image data of the previous frame with the image data of the present frame, and determining whether the image data are changed; and

performing a high quality compression control when the data are changed.