Signal compressing system

• US 7,724,824 B2
• Filed: 01/05/2009
• Issued: 05/25/2010
• Est. Priority Date: 02/29/1992
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Hen-Hee, Mun, Je-Chang, Jeong
• Primary Examiner(s): VO, TUNG T
• Application Number:
  US12/348,539
• Publication Number:
  US 20090103627A1
• Time in Patent Office: 505 Days
• Field of Search: 375/240.15, 375/240.16, 375/240.17, 375/240.03, 382/236, 382/232, 382/234
• US Class Current: 375/240.18
• CPC Class Codes: H04N 19/129 Scanning of coding units, e.g. zig-zag scan of transform coefficients or flexible macroblock ordering [FMO]
• CPC Class Codes: H04N 19/146 Data rate or code amount at the encoder output
• CPC Class Codes: H04N 19/15 by monitoring actual compressed data size at the memory before deciding storage at the transmission buffer
• CPC Class Codes: H04N 19/152 by measuring the fullness of the transmission buffer
• CPC Class Codes: H04N 19/176 the region being a block, e.g. a macroblock
• CPC Class Codes: H04N 19/18 the unit being a set of transform coefficients
• CPC Class Codes: H04N 19/46 Embedding additional information in the video signal during the compression process H04N19/517, H04N19/68, H04N19/70 take precedence
• CPC Class Codes: H04N 19/61 in combination with predictive coding

Abstract

A multi-scanner scans a signal according to several different patterns. A scanning pattern selector determines which scanning pattern produced the most efficient coding result, for example, for runlength coding, and outputs a coded signal, coded most efficiently, and a selection signal which identifies the scanning pattern found to be most efficient.

Claims

1. An apparatus in a video signal decompression system, comprising:

receiver which receives a scanning mode signal from a demultiplexer which extracts variable length coded data and scanning mode signal from a received signal the scanning mode signal not being variable length coded, the receiver further receiving variable length decoded data from a variable length decoder;

selector which selects a scanning pattern from a plurality of scanning patterns by using the scanning mode signal; and

scanner which scans the variable decoded data based on the scanning mode signal,

wherein the selected scanning pattern reorders a set of video spatial frequency coefficients of an individual sub-block to an original order.

2. The apparatus of claim 1, wherein the video signal decompression system decodes a coded data signal which includes the variable length coded data representing the set of video spatial frequency coefficients of the individual sub-block, the set of video spatial frequency coefficients having been reordered from the original order according to the selected scanning pattern, and the scanning mode signal indicating the selected scanning pattern.