Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reissue Patent
2006-10-03
2006-10-03
Vo, Tung (Department: 2613)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
Reissue Patent
active
RE039318
ABSTRACT:
An image processing method for dividing a digital image signal into plural image signals corresponding to plural blocks constituting a single display screen, and performing block-by-block coding of the image signals of the respective blocks, comprises transforming an image signal of a coding target block to be subjected to coding into frequency components by frame-by-frame frequency transformation on a frame basis or field-by-field frequency transformation on a field basis; setting a processing order for coding the frequency components corresponding to the image signal of the coding target block, according as the image signal of the coding target block has been subjected to the frame-by-frame frequency transformation or the field-by-field frequency transformation; and successively coding the frequency components corresponding to the image signal of the coding target block according to the order which has been set. Therefore, in coding of an interlaced image or a specific progressive image in which frame DCT blocks and field DCT blocks coexist, a run length is increased, thereby improving coding efficiency.
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Boon Choong Seng
Kadono Shinya
Nishi Takahiro
Takahashi Toshiya
Steptoe & Johnson LLP
Vo Tung
LandOfFree
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