Recording method having temporary buffering

Details Recording method having temporary buffering Recording method having temporary buffering

1999-05-13

2000-12-19

Dinh, Tan

Dynamic information storage or retrieval

Combined independent audio systems

Radio

369 25, H04H 900, G11B 1900

Patent

active

061635081

ABSTRACT:
The initial portion of an audio work received from an audio source is temporarily buffered so as to allow a user to make a recording of an audio work, including the initial portion of the audio work, even when the decision to record is made after the audio work has begun. In one embodiment, the incoming data stream representing the audio work is monitored for the presence of a sound gap, indicating the beginning of a new audio work. A DSP compresses the data, preferably according to perceptual coding technique such as MPEG-3 or Windows Media Technology 4.0, and forwards the compressed data to a short term memory buffer, such as a simple FIFO buffer, for temporary storage. If the user initiates a recording procedure before buffer is filled, a central controller pulls the compressed data from the buffer and transfers it to long term memory. If the user fails to act before the buffer fills, the buffer is flushed, and the process prepares for the next audio work. Thus, before recording begins, the data in the buffer includes at least the initial portion of the audio work. This method is particularly adapted for use in small hand-held devices, such as a combined cellular telephone with digital recording, and car radios, and the like.

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