Patent ID: 6771777
Filing Date: 2004-08-03
Classification: H04S

Abstract:
A method of coding stereo audio spectral values, comprising the steps of:grouping the stereo audio spectral values in scale factor bands with which scale factors are associated; forming sections, each comprising at least one scale factor band; allocating a predetermined code book out of a plurality of predetermined code books to at least one section, to obtain an allocated predetermined code book for the at least one section wherein each of the predetermined code books has assigned to it a unique code book number; coding the stereo audio spectral values within the at least one section using the allocated code book, to obtain coded stereo audio spectral values for the at least one section; transmitting a unique code book number assigned to be allocated code book as side information for the coded stereo audio spectral values in the at least one section at a code book number position required by a bit stream syntax for a section; allocating an additional code book number to another section, wherein the additional code book number is not assigned to a predetermined code book out of the plurality of predetermined code books, the additional code book number signaling to a decoder, encoding information relevant to the another section, the encoding information not including a reference to a predetermined code book out of the plurality of predetermined code books; transmitting the additional code book number as side information for the another section at the code book number position required by the bit stream syntax for a section; wherein either a unique code book number assigned to a predetermined code book out of the plurality of predetermined code books or the additional code book number signaling the encoding information is transmitted at the code book number position required by the bit stream syntax, so that an amount of side information for a section that is not affected by signaling the encoding information to the decoder.