Seagate Technology Incorporated

Cirrus Logic Inc.

Ben Chang

Erhard Theodor Schreck

Babu S Rahman

Timothy Glassburn

Liu Yanning

A sound recording device includes a disk drive, a microphone, and a controller. The disk drive writes data on a rotatable data storage disk therein. The microphone generates a microphone signal which includes a desired sound component and a noise component from noise that is generated by the disk drive. The controller filters the microphone signal to reduce the noise component from the disk drive relative to the desired sound component, and writes the filtered microphone signal on the disk. Accordingly, noise from the disk drive can be attenuated during recording by the sound recording device.

Filtering a microphone signal to remove noise components generated by a disk drive

Logic for a 1394-enabled system is disclosed which enables multiple internal link layers, connected to corresponding 1394 devices, to communicate with each other without an intervening physical layer, thereby eliminating one or more PHY chips and associated PHY-PHY cables and connectors (reducing both cost and power consumption). Using a single, optional PHY chip or the integrated PHY block, the internal devices can also communicate with external 1394 devices. The logic can also include, among other elements: multi-node logic to permit data to be transmitted between a device on an external 1394 bus and a selected one of two or more internal link layers; packet overlap logic to permit data to be transmitted between two internal link layers while data is being transmitted on an external 1394 bus; and a PHY-emulation module to provide each internal link layer with a corresponding &ldquo;virtual&rdquo; PHY layer having a node ID which is unique on an external 1394 bus.

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Cupertino, CA, United States of America

Ben Chang