Vendor: Cologne Chip AG Category: Audio Codec

Quad Voice CODEC compliant to ITU-T G.712

Cologne Chip’s IP core C3-CODEC-G712-4 consists of four voice CODECs for telephony applications in compliance with ITU-T recommen…

Overview

Cologne Chip’s IP core C3-CODEC-G712-4 consists of four voice CODECs for telephony applications in compliance with ITU-T recommendation G.712 or G.711.

Usually the ADC and the DAC in a CODEC need analog parts to be integrated into the chip. In contrast C3-CODEC-G712-4 is fully digital. All needed analog characteristics are moved into a few external resistors and capacitors per CODEC. The analog functionality is connected outside the core to three digital I/O Buffers per CODEC.

The main part of the core area is used for digital filters in the transmit and receive path according to ITU-T recommendation G.712. There are sophisticated digital machines in the frontend of the core to minimize the external component cost. Implementing analog functions into fully digital CMOS circuitries becomes feasible by means of DIGICC, Cologne Chip’s digital approach for IP cores. A patent is pending for this DIGICC technology of Cologne Chip.

Key features

  • 4 CODECs implemented
  • Fully digital
  • Interface data format configurable:
    • 16 bit linear or
    • 8 bit a-law / µ-law according to ITU-T recommendation G.711
  • Performance of the filters according to ITU-T recommendation G.712
  • Implementable in any CMOS process technology
  • Implementable also into FPGA with external buffer
  • Only 3 digital I/O pins needed for each CODEC
  • Only a few resistors and capacitors required as external components
  • The signal to total distortion complies to ITU-T recommendation G.712
  • Suppression of 50 Hz and 60 Hz in the ADC better than 45 dB
  • Separate gains for transmit paths (ADC) and receive paths (DAC) for each CODEC programmable
  • Power reduction to nearby zero in stand-by mode possible
  • 8 kSample/s or 16 kSample/s internal data configurable for 3.1 kHz or 7 kHz audio bandwidth
  • Clock frequency: 24.576 MHz
  • Area: approx. 60k logic gates + RAM
  • RAM: 4 synchronous, single port RAM blocks (128x32bit + 64x32bit + 64x16bit + 32x16bit = 7.68kbit)
  • Core version with only three, two or one CODEC available (reducing by one CODEC decreases the core by 6k logic gates and 1.92 kbit RAM)

Benefits

  • Fully digital
  • Implementable in any CMOS process technology
  • Implementable also into FPGA with external buffer
  • Only 3 digital I/O pins needed for each CODEC
  • Only a few resistors and capacitors required as external components
  • easy to integrate into all IC designs

What’s Included?

  • Compiled netlist for destination technology, test vectors and behavioral models.

Specifications

Identity

Part Number
C3-CODEC-G712-4
Vendor
Cologne Chip AG
Type
Silicon IP

Files

Product Sheet Download

Note: some files may require an NDA depending on provider policy.

Provider

Cologne Chip AG
HQ: Germany

Learn more about Audio Codec IP core

Fully Digital Implemented Delta-Sigma Analog to Digital Converter

This paper shows an approach which only uses 2 resistors and 1 capacitor which are located outside a pure digital chip. So all integration advantages of pure digital chips are preserved, there is no design effort for a new chip generation and the ADC also can be used for FPGAs.

Frequently asked questions about Audio Codec IP cores

What is Quad Voice CODEC compliant to ITU-T G.712?

Quad Voice CODEC compliant to ITU-T G.712 is a Audio Codec IP core from Cologne Chip AG listed on Semi IP Hub.

How should engineers evaluate this Audio Codec?

Engineers should review the overview, key features, supported foundries and nodes, maturity, deliverables, and provider information before shortlisting this Audio Codec IP.

Can this semiconductor IP be compared with similar products?

Yes. Buyers can compare this product with similar semiconductor IP cores or IP families based on category, provider, process options, and structured technical specifications.

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