Patent ID: 6272182
Filing Date: 2001-08-07
Classification: G11B,H04H,H04L

Abstract:
A digital transmission system comprising a transmitter including:transmitter input means for receiving samples of a digital audio signal and for receiving a first information word indicating a specific wordlength of the samples and a second information word indicating a specific sampling rate of the samples; andformatting means for combining the samples and the first and second information words into a serial datastream, the wordlength of the samples expressed in a number of bits, being equal to n, where n is an integer larger than zero, and the sampling rate equal to 2.sup.p *F.sub.s, where p is an integer larger than zero and F.sub.s is a frequency value selected from a group of frequency values consisting of: 32 kHz, 44.1 kHz and 48 kHz; andmeans for transmitting the serial datastream through a medium;receiver input means for receiving the serial datastream from the transmission medium;retrieval means for retrieving the first and second information words from the serial datastream, and for retrieving the samples of the digital audio signal from the serial datastream using the first information word;sample rate conversion means for converting the sampling rate of the samples from the sampling rate defined by the second information word into a second sampling rate so as to obtain an sample rate converted digital audio signal, wherein the second sampling rate is equal to 2.sup.q *F.sub.s ', where q is an integer larger than zero and F.sub.s ' is a frequency value selected from a group of frequency values consisting of: 32 kHz, 44.1 kHz and 48 kHz, the samples in the sample rate converted digital audio signal having a specific wordlength: the sample rate conversion means including:upsampling means for upsampling the samples of the digital audio signal so as to obtain an upsampled digital audio signal having a sampling rate equal to 2.sup.q *F.sub.s '; andvariable hold means for variably holding samples of the upsampled digital audio signal so as to obtain the sample rate converted digital audio signal; andthe receiver further including, output means for supplying the sample rate converted digital audio signal at the second sampling rate.