Overview

The PSB 7230 Joint Audio Decoder Encoder for Analog Videophones (JADE AN) is a device which implements voice compression algorithms using the Algebraic Code Excited Linear Prediction (ACELP) and the Multi-Pulse Maximum Likelihood Quantization (MP-MLQ) standard as defined in the ITU-T G.723 Recommendation. In addition G.711 PCM audio coding is also supported.

Feature List

Functions

– G.723 V5.1 Compression/Decompression (6.3, 5.3 Kbit/s)

– Accepts/outputs uncompressed audio in 8-bit PCM A/μ law or 16-bit linear format

– G.711 Compression/Decompression (64 Kbit/s)

– Uncompressed/compressed audio switchable between different interface combinations (IOM?/Serial Audio Interface, IOM/Host, Host/Host)

– Inband controlled H.221/H.223 oriented audio protocol, e.g. for direct serial connection to Videocodec (VCP of 8 × 8 Inc., formerly IIT Inc.) as well as host based solutions

– Outband controlled audio protocol with optimized data rate

– Stable reaction on interrupt handshake timing violations of e.g. a slow host (Windows? PC)

System On-Chip Functions

– One universal serial transparent data controller

– IOM-2 Monitor and C/I channels

– Generation of programmable system clock output

Interfaces

– 4-line IOM-2/PCM interface (programmable master or slave)

– 5-line serial audio interface, e.g. for connection to Videocodec/H.221/223 processor

– Parallel 8-bit Host interface

– 4-line general purpose interface

Control

– Programmable via Parallel Host Interface

– Operating parameters and mode settings via a register bank

– Access to audio channels and serial transparent data controller from DSP or an external Host

– Interface to external software via a full-duplex 256-byte on-chip mailbox

– H.221/H.223 oriented inband configuration/mode switching

General

– Supply voltage: 3.0 - 3.6 V

– Additional 4.5 to 5.5 V supply for connection to 5 V systems without external components

– Ambient temperature range 0 °C to + 70 °C

– P-TQFP-100 package