METHOD OF AND APPARATUS FOR CODING, MANIPULATING AND DECODING AUDIO SIGNALS

摘要

The method and the apparatus allow coding, manipulation and decoding of audio signals independently of the specific signal content. An encoder (AC) carries out an object-oriented coding and generates a coded signal, with variable bit rate and bandwidth, comprising a basic layer and one or more enhancement layers for each object. The encoder (AC) is able to operate according both to ad hoc algorithms and to any standardised algorithm and selects the most convenient algorithm depending on the object to be coded. Bit stream manipulation units along a transmission path towards a decoder (AD) allow scaling the bit rate or the bandwidth of the coded signal or altering parameters of the coded signal by acting on individual objects.