Patent ID: 6876772
Filing Date: 2005-04-05
Classification: H04N

Abstract:
1. A picture-encoding apparatus for generating a packet of an encoded-code stream having a predetermined format, said picture-encoding apparatus comprising: filtering means for orienting low-band and high-band filters for an input picture in vertical and horizontal directions to generate coefficients; bit-plane-generating means for spreading said coefficients generated by said filtering means over bit-planes ranging from an MSB (most significant bit) bit-plane to an LSB (least significant bit) bit-plane; encoding-pass-generating means for generating encoding passes for each of said bit-planes; an arithmetic encoding unit for carrying out an arithmetic encoding process in each of said encoding passes to generate arithmetic code; encoded-data-quantity control means for controlling an encoded-data quantity so as to achieve a target encoded-data quantity for said generated arithmetic code; a packet-generating unit for generating said packet by addition of a header to said arithmetic code experiencing control of said encoded-data quantity executed by said encoded-data quantity control means; and encoded-code-stream-truncating means for truncating said encoded-code stream completing processing through all said encoding passes by discarding a rear portion of said encoded-code stream so as to make an encoded-data quantity of said encoded-code stream equal to a target encoded-data quantity.