Patent ID: 6035044
Filing Date: 2000-03-07
Classification: H04N

Abstract:
A method of transmitting/receiving video, comprising:compressing an original video signal by orthogonal transform, quantization, and variable-length encoding performed in this order, said variable-length encoding step including:dividing a quantized video signal into high frequency components and low frequency components;soft scrambling said high frequency components but not said low frequency components in an individual orthogonal transform block, said soft scrambling step including transforming said low frequency components in accordance with an original variable-length coding table to produce a first scrambled signal and then transforming said first scrambled signal in accordance with another variable-length coding table having a same number of bits to produce a second scrambled signal;combining said second scrambled signal and said low frequency components into a combined signal; andtransmitting said combined signal as a signal to be transmitted.