Method and system for transmitting variable rate speech signal

A speech transmission system for transmitting coded signals with variable bit rate comprising:

• coding means for transforming original signals each inputted in a predetermined period of time into a plurality of coded data representing characteristics thereof, wherein said coding means comprises
• first coding means for transforming said inputted signals into a first group of coded data with a predetermined coding algorithm,
• means for obtaining error signals corresponding to the difference between signals reproduced on the basis of said first group of coded data and said inputted original signals, and
• second coding means for transforming said error signals into a second group of coded data, said first group of coded data at first and then said second group of coded data being outputted by said data arranging means;
• data arranging means connected with said coding means for outputting said plurality of coded data in an order of decreasing priority in the reproducing of the original signals;
• and
• means for allowing a series of coded data outputted by said data arranging means to pass an amount of data corresponding to a determined transmission rate.

A signal transmission system for transmitting coded signals with variable bit rate comprising:

• coding means for analyzing speech signals inputted in a predetermined period of time and transforming the inputted signals into a plurality of coded data representing characteristics thereof;
• data arranging means connected with said coding means for outputting said plurality of coded data in an order of decreasing priority in the decoding of the speech signals, wherein said data arranging means includes means for decomposing said plurality of coded data in unit of a bit and memory means for storing a plurality of sort patterns, the rearranging means rearranging the bits on the basis of a sort pattern read-out from said memory means depending on the inputted speech signals, said coded data being outputted in an order of bits of decreasing priority;
• and
• means for allowing a series of coded data outputted by said data arranging means to pass an amount of data corresponding to a determined transmission rate.