Press release

08 October 1998

Ensigma Ltd Develops Enhanced Variable Rate codec Software on DSP Group’s OAKDSPCORE

Share on linkedin
Share on twitter
Share on facebook
Share on google

Ensigma announced today the completion of its Enhanced Variable Rate codec (EVRC) IS-127 implementation for DSP Group’s OakDSPCore . The EVRC codec is used in the IS-95 CDMA system offering enhanced speech quality compared to the original 8k QCELP vocoder. EVRC is also to be used in the Japanese W-CDMA and U.S. CDMA-2000 systems. Clifford Parris, head of the coding group at Ensigma, said "We are the first company to be offering an EVRC solution". The company said the excellent development tools offer a faster time to market compared to rival DSPs.

"We are pleased to have Ensigma as a developer and software provider for our OakDSPCore," said Gideon Wertheizer, Vice President of Corporate Marketing for DSP Group. "Ensigma’s EVRC solution allows OEMs to bring CDMA systems to the market quickly," Wertheizer continued.

The following summarises Ensigma’s EVRC offering for the OakDSPCore:

Features and Benefits:

  • Conforms to OakDSPCore C environment
  • Full test harness supplied for OakDSPCore simulator
  • Full documentation
  • Channel post filtering
  • Noise cancellation
  • Multiple channels

The Ensigma implementation is fully compliant with TIA/EIA bit-exact specifications:

  • IS-127
  • IS-718

Processor and System Requirements:

  • Program memory (ROM) – 14952 words
  • Data memory (ROM) – 7334 words
  • Data memory (XRAM) – 1630 words (permanent per channel) plus
    1899 words temporary (including I/O buffers)
  • Data memory (YRAM) – 504 words (temporary)
  • Encoder MIPS – 20.79 (worst case frame measured over IS-718
    bit exact test vector suite)
  • Decoder MIPS – 2.96 (worst case frame measured over IS-718 bit
    exact test vector suite)

The company said that the OakDSPCore has proven itself as the DSP of choice for mobile communications offering a compact and efficient solution. The company also said that further optimisation of the software will be ongoing throughout 1998 including investigation of non bit exact solutions.

Media contacts

If you have any enquiries regarding any of our news or press release items, please contact:

United Kingdom
Tel: +44 (0)1923 260 511
Tel: +44 (0)1923 260 511

Related blog articles

Three great reasons to visit the Imagination booth at GDC 2019

The Game Developer Conference is a highlight of the year for anyone involved in the graphics world and naturally, Imagination is there, located at booth S763, at the Moscone Center, in San Francisco. If you’re looking to find out a

Making Unreal Engine and Unity profiling on PowerVR easier

The PowerVR Developer Technology team has always been fully committed to making development for PowerVR easier, by continually improving our groundbreaking tools and SDK. Our ecosystem is very important to us, so we’re focusing on the things developers really need

Product and event round-up from the experts in GPU and AI

It’s certainly been a busy few months for Imagination. Towards the latter end of last year, we released a raft of new products and initiatives, and a new CEO took the helm giving us real momentum for 2019. At the

Stay up-to-date with Imagination

Sign up to receive the latest news and product updates from Imagination straight to your inbox.

  • This field is for validation purposes and should be left unchanged.