Continuous Variable Slope Delta Modulation Timing and Control for Audio Circuitry
Original Publication Date: 1987-Oct-01
Included in the Prior Art Database: 2005-Feb-02
A technique is described whereby continuous variable slope delta (CVSD) modulation circuitry is improved through the addition of data buffering and control circuitry, so as to extend record and playback timing windows, as used in audio recording and playback sections of personal computers (PCs). The addition of data buffering and control circuitry enables the PC processor to execute a variety of tasks without encountering contention problems. As a result, additional software applications enable voice data to be used interactively with the keyboard for messaging or voice annotation programming.