SIGNAL COMPRESSING SYSTEM

• US 20090103628A1
• Filed: 01/05/2009
• Published: 04/23/2009
• Est. Priority Date: 02/29/1992
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jeong, Je-Chang, Mun, Hen-Hee
• Granted Patent: US 7,742,522 B2
• Time in Patent Office: Days
• US Class Current: 375/240.240
• 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. A scanning pattern selecting method in a video signal decompression system, the method comprising the steps of:

receiving a scanning mode signal from an extractor which extracts entropy encoded data and the scanning mode signal from a received signal in a video signal decompression system; and

selecting a scanning pattern from a plurality of scanning patterns by 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 method of claim 1, wherein the video signal decompression system decodes a coded data signal which includes the entropy encoded 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.