Patent ID: 6978241
Filing Date: 2005-12-20
Classification: G10L

Abstract:
1. Transmission system comprising a transmitter with an encoder for encoding an audio signal, the encoder comprises frequency determining means for determining a frequency of at least one periodical component of the audio signal, the transmitter further comprises transmitting means for transmitting a signal representing said frequency to a receiver, said receiver comprises receiving means for receiving a signal representing said frequency from the transmitter, and a decoder for deriving a reconstructed audio signal on the basis of said frequency, wherein the encoder further comprises frequency change determining means for determining a rate of frequency change of said at least one periodical component of the audio signal over a predetermined amount of time to be used by said decoder for deriving said reconstructed audio signal, wherein the frequency change determining means further determines an average frequency of the at least one periodical component of the audio signal over the predetermined amount of time to be used by said decoder for deriving said reconstructed audio signal, wherein the transmitting means transmits two further signals representing, respectively, said frequency change to the receiver and said average frequency of the at least one periodical component, and the receiver receives said further signal, the decoder deriving said reconstructed audio signal also on basis of said frequency change.