Mixed-Signal Digital Signal Processors for Integrated Access Devices Color

Features

• High-performance, programmable DSP optimized for low-cost, low power two-port or one-port Voice-over-Internet Protocol (VoIP), IP Phone and Voice over Digital Subscriber Line (VoDSL) applications
  
• ROM-based device, including complete DSP firmware for VoIP applications
  
• Pin-to-pin compatible with VoicePump’s four-port VP140.
  
• Performs all necessary voiceband processing functions such as speech coding, G.168 echo cancellation, and signaling for one or two voice channels
  
• On-chip sigma-delta A/D, D/A converters reduce component count, system cost
  
• 8/16-bit host port permits interfacing to a variety of host processors including PowerPC^®, ARM®, and MIPS^®
  
• Low-power 3.3V design
  
• Host Processor Driver and Application Programming Interface (API) source code available to facilitate system integration of VP120/110 into proprietary designs
  
• Complete VP120 Host CPU reference designs available supporting an Ethernet interface, RTP/UDP/IP protocol stacks for voice and signaling via MGCP, SIP or H.323
  

Functional Description

VoicePump’s VP120/110 mixed-signal digital signal processors (DSPs) are designed to address the voiceband processing needs of low density voice gateways and Integrated Access Devices (IADs) for VoIP and other Voice-Over-Broadband applications. A variety of speech coding and telephony applications are configurable on a per channel basis via a flexible Host Processor Interface protocol. With all requisite software in ROM, the VP120/110 serves as a ”glueless” black box interfacing analog telephone channels to a packet based host processor. The VP120/110 is based upon DSP Group’s TeakLite® processor. It includes an integrated set of peripherals that have been optimized for use in IADs and Voice-over-Broadband networks.

• No external memory required for complete functionality
• Host processor interface
• Integrated Speaker Power Amplifier providing 250mW into 8 Ohm Speaker
• Two Sigma-delta A/D, D/A converters with complete analog front end
• General purpose input/output pins permit glueless interface to Subscriber Line Interface Circuits (SLICs) or other devices

BLES VoDSL Firmware Included:

• G.711 64 kbps A-m-law PCM Speech Codec
• G.723.1 6.4/5.3 kbps MP-MLQ/ACELP Speech Codec
• G.726 16/24/32/40 kbps ADPCM Speech/Audio Codec
• G.729 A/B 8 kbps CS-ACELP Speech Codec
• Voice Activity Detection (VAD)
• Comfort Noise Generation (CNG)
• G.168 Line Echo Cancellation
• DTMF and Tone Detection
• Programmable tone generation
• Caller ID FSK Modulation
• Jitter Buffer
• Error Mitigation

VoicePump Company Overview

VoicePump, Inc. was originally established in 1993 as Analogical Systems, a developer of real-time DSP software for speech coding and telecom applications. In 1998, Analogical Systems developed complete system-level software applications for embedded Voice over Packet Network products and thereafter adopted the “VoicePump” company name. In March, 2001, DSP Group completed its acquisition of VoicePump which now develops integrated silicon solutions for VoIP, VoDSL and other voice over packet applications. VoicePump’s products embed optimized, field-proven speech coding and telecom algorithms and system-on-chip solutions for packet voice processing, ideal for voice-gateway and customer premises equipment manufacturers seeking “black box” DSP solutions.

VoIP Application

VoicePump’s innovative VP120 and VP110 family of ASSP’s provide low cost, low power one and two-port solutions for VoIP phone applications. In this application, a host processor performs the protocol stack and networking functions. The VP120/110 performs speech compression on each voice channel, which is then packetized and sent in place of a corresponding portion of the bandwidth of the data network. Ease of use, along with a full feature set of firmware allows rapid development of embedded VoIP telephony products and applications.

Single-Chip Four-Port VoDSL/VoIP Solution: The VP120/110 contains all requisite peripherals (memory, A/Ds and D/As) and processing power to perform two channels of G.168 echo-cancelled G.711/G.726/G.723.1/G.729A/B on each channel, in addition to tone detection/generation.

To download the datasheet please click here