Title:
記憶容量の低減と色回転と複合信号と境界フィルタ処理とをともなったビデオ圧縮
Document Type and Number:
Japanese Patent JP4471495
Kind Code:
B2
Abstract:
A technique (200) for compressing video images (102) uses temporary compression of blocks during compression, integrated color rotation of compressed images, direct compression of a composite video signal, and border filters to allow blocks to be compressed independently. Temporary compression reduces storage needed in an integrated circuit. An incoming frame (12) is compressed block-by-block and placed in temporary storage (118). A corresponding block of a later frame is also compressed. Both blocks are decoded back into the transform domain and the two blocks are compared in the transform domain (122). Color rotation (132) on compressed color information is integrated with overall compression and is performed upon the chrominance transform pyramids (592, 596) after transformation of the video signal rather than performing a rotation on the raw signal itself. Color rotation (132) is performed at any stage and uses serial multiplication (shift and add) for more efficient processing, rather than using parallel multiplication. A composite video signal (82) including both color and black and white information is compressed directly without separating the color information from the black and white. A sequence of passes (214, 224, Figs. 12-16) separates the luminance and chrominance information from the composite video signal and demodulates the color carrier to separate out color information. Blocks of information are treated independently using a modified 2-6 Biorthogonal filter (106a, 409) to reduce complexity, to reduce harware needed and to reduce blocking artifacts. The technique identifies and compresses composite video, S video, and component video signals, and is applicable to low bit rate video applications.
Inventors:
Lynch William Sea.
Kolarov Kladimir Dee.
Hoover Dee. Robert
Aligii William Jay.
Kolarov Kladimir Dee.
Hoover Dee. Robert
Aligii William Jay.
Application Number:
JP2000549027A
Publication Date:
June 02, 2010
Filing Date:
May 14, 1999
Export Citation:
Assignee:
INTERVAL RESEARCH CORPORATION
International Classes:
H04N7/32; H04N7/26; H04N11/04; H04N7/30
Domestic Patent References:
| JP9098429A | ||||
| JP8116539A | ||||
| JP9182085A |
Attorney, Agent or Firm:
Takao Igarashi
Takashi Shimoide
Hiroshi Ichikawa
Mitsuhiro Kato
Takashi Shimoide
Hiroshi Ichikawa
Mitsuhiro Kato