Comparing CODEC input/output to adjust psycho-acoustic parameters

An adjustable CODEC for compression and decompression of signals including:

• a first input for receiving a first signal;
• an auxiliary input for receiving an auxiliary signal;
• a parameter input unit cooperatively connected to an encoder for inputting and adjusting at least one parameter level of a plurality of psycho-acoustic parameter levels, said encoder containing a compression unit for compressing said first signal and said auxiliary signal and compressing at least said first signal based on said parameter levels of said plurality of psycho-acoustic parameters to form a compressed digital bit stream;
• a decoder containing a decompression unit for decompressing said compressed digital bit stream to form at least a decompressed first signal and a decompressed auxiliary signal;
• an output connected to the decoder for outputting said decompressed first signal;
• an auxiliary output connected to the decoder for outputting said decompressed auxiliary signal;
• and
• a comparing device for comparing characteristics of said first signal and said decompressed first signal whereby the comparison provided by the comparing device may be the basis for adjusting said parameter level of said plurality of psycho-acoustic parameter levels.

A method of compression and decompression of signals comprising the steps of:

• receiving an audio signal;
• inputting at least one parameter level of a plurality of psycho-acoustic parameter levels;
• compressing said received signal based on said parameter levels of said plurality of psycho-acoustic parameters to form a compressed digital bit stream;
• decompressing said compressed digital bit stream to form a decompressed signal;
• outputting said decompressed signal;
• and
• comparing the characteristics of said audio signal and said decompressed signal and adjusting an adjustable parameter input unit in order to modify said at least one parameter level based on said comparison.