Patent ID: 6985783

Claim:
An audio reproduction system, comprising: means for acquiring a stream of data which contains encoded audio data; a data device for processing the stream of data connected to the means for acquiring, the data device operable to form at least one channel of PCM data on an at least one device output terminal; a digital to analog converter connected to the output terminal operable to convert the channel of PCM data to an analog audio signal on a D/A output terminal; a speaker subsystem connected to the D/A output terminal; and wherein the data device further comprises: an instruction register operable to hold an instruction during processing by the data processing device; a central processing unit (CPU) operationally connected to the instruction register and operable to process a data word in response to the instruction; an index register operationally connected to the instruction register and operable to provide a first address in response to the instruction; and address circuitry operable to form a memory address of the data word by selecting a first portion of the first address from the index register and combining the first portion of the first address with a first portion of an immediate field selected from the instruction, such that the first portion of the immediate field is a most significant address portion with the first portion of the first address as a least significant address portion, wherein the first portion of the immediate field has a first width and the first portion of the first address has a second width.