Blackberry Corporation

Research in Motion Corporation

Scott Edward Bulgin

Lawrence Edward Kuhl

David James Mak-Fan

Larry Kuhl

Cyril Antoine Martin

Bengt Stefan Gustavsson

Lawrence E Kuhl

David J Mak-Fan

A voicemail system utilizing a wireless handheld device with a suitable user interface for presenting voice messages and email messages is disclosed. Voice messages are received over a wireless network, and stored on the handheld device. Upon receipt of a voice message, the handheld device records the audio message in local memory. Subsequently a message record entry corresponding to the received audio message is displayed in a user interface screen of the handheld. When the user opens the displayed message record, the handheld device plays back the corresponding audio message stored in local memory.

Voicemail system for a handheld device

An efficient low latency buffer, and method of operation, is described. The efficient low latency buffer may be used as a bi-directional memory buffer in an audio playback device to buffer both output and input data. An application processor coupled to the bi-directional memory buffer is responsive to an indication to write data to the bi-directional memory buffer reads a defined size of input data from the bi-directional memory buffer. The input data read from the bi-directional memory buffer is replaced with output data of the defined size. In response to a mode-change signal, the defined size of data is changed that is read and written from and to the bi-directional memory buffer. The buffer may allow the application processor to enter a low-powered sleep mode more frequently.

Efficient low-latency buffer

An efficient low latency buffer, and method of operation, is described. The efficient low latency buffer may be used as a bi-directional buffer in an audio playback device to buffer both output and input data. The audio buffer includes two modes of operation. The first mode replaces large segments of data at a first rate, and the second mode replaces smaller segments of data at a second rate, higher than the first rate. The first mode may make efficient use of the buffer for the output, data while the second mode may provide low latency for the buffering of the input data.

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St. Clements, Canada

Scott Edward Bulgin