Title:
METHOD AND DEVICE FOR PROCESSING IMAGE SIGNAL
Document Type and Number:
Japanese Patent JPS6012884
Kind Code:
A
Abstract:
An apparatus and method for signal processing employing intraframe and interframe variable prediction transform coding. Images are represented by sequential frames of two-dimensional arrays of digital signals. The digital signals are transformed to form transform coefficients for each frame. Predicted transform coefficients are formed using sets of variable prediction factors. The predicted transform coefficients for each frame are compared with corresponding actual transform coefficients for the frame to form transform coefficient difference signals. The difference signals are processed to control their range of values. The processed difference signals are statistically coded such that the more frequently occurring values are represented by shorter code lengths and the less frequently occurring values are represented by longer code lengths. The coded signals are stored in a buffer memory for transmission.
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Inventors:
UEN SHIYUN CHIEN
JIEIMUZU PAAKAA ERIOTSUTO
ROBAATO EDOUIN JIYOOJI NIYUUER
RARUFU EMAASON NIKORUZU
ARUBAATO EDOWAAZU RAKETSUTO
JIEIMUZU PAAKAA ERIOTSUTO
ROBAATO EDOUIN JIYOOJI NIYUUER
RARUFU EMAASON NIKORUZU
ARUBAATO EDOWAAZU RAKETSUTO
Application Number:
JP6048984A
Publication Date:
January 23, 1985
Filing Date:
March 28, 1984
Export Citation:
Assignee:
COMPRESSION LABS INC
International Classes:
H03M7/30; B25J1/06; G06T9/00; H04B14/06; H04N7/30; H04N7/32; H04N7/50; (IPC1-7): H04N7/137; H03M7/30; H04B14/06
Domestic Patent References:
| JPS53146526A | 1978-12-20 | |||
| JPS5761387A | 1982-04-13 |
Attorney, Agent or Firm:
Minoru Nakamura