Cirrus Logic Inc.

Terry Ritchie

Raghunath Krishna Rao

Jeffrey A Niehaus

Miroslav V Dokic

James S Divine

Zheng Luo

John Robert Pacourek

Baker Scott, Iii

An audio decoder 100 for operating on a received compressed audio data stream compressed using an algorithm employing transform encoding and a bit allocation routine. A first processor 200 performs a first set of operations on the received compressed audio data stream including parsing the compressed audio data stream, recovering data fields within the compressed audio data stream, calculating a bit allocation, and passing frequency domain coefficients to shared memory. A second digital signal processor 100b performs a second set of operations on data passed from the first digital signal processor to shared memory including performing inverse transform operations on the data passed from the first digital signal processor.

Dual processor digital audio decoder with shared memory data transfer

A message is transferred from external device through a first processor and from the first processor to a second processor. A check is made that the message passed to the second processor without error. The message is interpreted by a selected one of the first and second processors. Boot operations are performed by the selected processor in response to the interpretation of the message.

Methods for booting a multiprocessor system

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Austin, TX, United States of America

Terry Ritchie