Q67101-H6773 Просмотр технического описания (PDF) - Infineon Technologies

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Q67101-H6773

Joint Audio Decoder-Encoder - Multimode

Infineon Technologies 

PSB 7238

Introduction

In a Videophone system using the 8×8 (formerly IIT) VCP (Video Codec and Multimedia

Communications Processor) the Siemens PSB 7238 can work standalone without the

need of external initialization. The default configuration of the JADE is such, that no host

is needed in this case and the full communication is done between the VCP and the

Siemens PSB 7238.

The voice compression algorithms are implemented by an embedded 16-bit fixed point

Digital Signal Processor with all memories internal and no external memory needed.

Integration of these and other features, as well as perfectly matched interfaces with other

ICs allows for the implementation of highly optimized, low cost system solutions e.g. for

Videophones, Data-over-voice and Channel Multiplexing equipment.

For system integration, two serial HDLC/transparent data channels are implemented

which can be serviced by an attached host (or the on-chip DSP). System functions and

communication between the chip and an external controller is supported by a full-duplex

256-byte on-chip mailbox communication memory.

The circuit is offered in a Quad Flat Pack package with 100 pins (P-TQFP-100: size

14 × 14 mm, pitch 0.5 mm, height 1.4 mm).

Note: This Data Sheet gives a thorough description of the functions and hardware that

forms the base of PSB 7238. It includes information (e.g. External Memory

Interface) that is not needed for the PSB 7238 as a “ready to use plug and play”

G.728/G.723/G.722/G.711 audio compression device.

Semiconductor Group

6

Data Sheet 1998-07-01

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