SYSTEM FOR TRANSMITTING A PLURALITY OF VIDEO PROGRAMS SIMULTANEOUSLY THROUGH A TRANSMISSION CHANNEL

摘要

PCT No. PCT/IB96/00138 Sec. 371 Date Oct. 22, 1996 Sec. 102(e) Date Oct. 22, 1996 PCT Filed Feb. 22, 1996 PCT Pub. No. WO96/26608 PCT Pub. Date Aug. 29, 1996System for transmitting n video programs simultaneously through a transmission channel having a predetermined bitrate, comprising in cascade a decoding assembly and an encoding assembly. The decoding assembly consists of n parallel decoding means provided in parallel for decoding the coded input signals corresponding to said programs, and the encoding assembly consists of n encoding means being in cascade with each of said decoding means and each comprising a quantizer having a variable step size and a variable length encoder. The system also comprises means for controlling the step sizes of said encoding means in dependence upon their respective output bitrates, and these control means are also provided for controlling the output bitrates of said encoding means in dependence upon complexity values associated to the coded input signals of each decoding means with respect to the joint complexity of the plurality of said coded signals.