Time-slot interchange circuit

Details Time-slot interchange circuit Time-slot interchange circuit

2008-01-15

2009-12-15

Phan, Tri H (Department: 2416)

Multiplex communications

Pathfinding or routing

Through a circuit switch

C370S442000, C370S498000, C370S535000

Reexamination Certificate

active

07633936

ABSTRACT:
A circuit and method are presented for signal processing and routing of digital voice telephony signals, using a specialized high-density integrated circuit voice processor. The voice processor performs several essential functions required for telephony processing, including echo cancellation, protocol conversion, and dynamic range compression/expansion. These functions are traditionally performed by multiple circuits or modules. By combining these capabilities in a single device, power and circuit board area requirements are reduced. The embodiment of the circuit and method disclosed herein include novel implementations of a time-slot interchange circuit and a telephony signaling circuit. Both of these circuits are designed to minimize demands on the signal processing engines incorporated within the voice processor, and account for very little of the on-chip circuitry.

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