Methods and apparatus for delayed block release in compact disc systems

Abstract

Disclosed is a disc drive system that includes a digital signal processor for processing information sectors read from a CD media. The digital signal processor is configured to parse the information sectors into data frames and subcode frames. A data auto-start unit for triggering a data transfer to a buffer memory when a desired data frame is detected. A subcode auto-start unit for triggering a subcode transfer to the buffer memory when a desired subcode frame is detected. Preferably, the desired data frame and the desired subcode frame have a same MSF. The disc drive system further includes a buffer manager having a plurality of counters that are configured to track the number of data frames and the number of subcode frames being transferred to the buffer memory, and releasing a block including one of the data frames and one of the subcode frames when the counters indicate that the block is complete.

Description

[0001] This application is related to the following US patent applications: (1) Ser. No. _______ (attorney docket no. ADAP019) filed on the same day as the instant application, and entitled "Methods and Apparatus For Compact Disc Automatic Start", and (2) Ser. No. ______ (attorney docket no. ADAP021) filed on the same day as the instant application, and entitled "Method and Apparatus for Subcode / Data Synchronization in a Compact Disc System". These applications are hereby incorporated by reference.

[0002] 1. Field of the Invention

[0003] This invention relates generally to compact discs, and more particularly efficient integrated circuit processing of sector components in high speed compact disc drives.

[0004] 2. Description of the Related Art

[0005] Compact disc drives have become increasingly popular due to their ability to rapidly access large quantities of data as well as provide fine quality digital play-back. To meet the need for increased data transfer rates, compact disc "CD" ha...

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