Patent ID: 8325622
Filing Date: 2012-12-04
Classification: G06F,G10L,H03M,H04N

Abstract:
1. An apparatus for encoding a source signal to be transmitted across a packet data network, the apparatus comprising: a first coder for generating a first set of parameters from said source signal and quantized parameters from said first set of parameters, and for performing a primary encoding of said quantized parameters; a redundancy coder for performing a redundant encoding of a second set of parameters of the source signal using a subset of the first set of parameters and a delayed set of said quantized parameters, said second set of parameters being a subset of a transformed set of the first set of parameters, wherein the redundancy coder is adapted to encode the second set of parameters into a redundant bit stream having a variable bit rate, the variable bit rate corresponding to a received bit rate control signal; and a bit rate controller providing the bit rate control signal in response to a packet-loss statistics value received from a packet-loss statistics calculator connected to said packet data network, wherein the redundancy coder includes: