Speech Enhancement software provides superior audio and speech quality in a variety of challenging communications environments. Our extensive experience with mobile, network and telephony applications will help you select the right solution for your speech enhancement needs. Please contact us to discuss your speech application requirements.

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VOCAL’s speech enhancement software is optimized for DSPs and conventional processors from TI, ADI, ARM, AMD, Intel and other leading vendors. Speech enhancement software is available for licensing as a library or part of a complete solution. Custom designs are also available.

Speech Enhancement

Speech enhancement is required in situations where the signal is to be communicated or stored and either the signal or its receiver is degraded. For example, hearing impaired individuals require enhancement of perfectly normal speech to fit their individual hearing capabilities. Speech signals produced in a room generate reverberations, which may be quite noticeable when a hands-free single channel telephone system is used and binaural listening is not possible. A speech coder may be designed for clean speech signals while its input signal may be noisy. Similarly, a speech recognition system may be operated in an environment different from that it was designed to work in.

VOCAL’s Speech enhancement software enables high-quality audio and voice communications over IP networks. Scalable audio/speech coding has become increasingly important to efficiently accommodate the bandwidth fluctuations in these types of communications. A scalable audio/speech bitstream typically consists of a base layer plus a number of enhancement layers. It is possible to use only a subset of the layers to decode the audio with lower sampling resolutions and/or quality. In streaming applications, the layers in a scalable bitstream are selectively delivered to adapt to network bandwidth fluctuation and packet loss level. When the available bandwidth is low or packet loss ratio is high, only the base layer is transmitted.

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VOCAL’s optimized software is available for the following platforms. Please contact us for specific speech enhancement supported platforms.

ProcessorsOperating Systems
  • Texas Instruments – C6000 (TMS320C62x, TMS320C64x, TMS320C645x, TMS320C66x, TMS320C67x), DaVinci, OMAP, C5000 (TMS320C54x, TMS320C55x)
  • Analog Devices – Blackfin, ADSP-21xx, TigerSHARC, SHARC
  • PowerPC
  • MIPS – MIPS32, MIPS64, MIPS4Kc
  • ARM – ARM7, ARM9, ARM9E, ARM10E, ARM11, StrongARM, ARM Cortex-A8, Cortex-M1
  • Intel / AMD – x86, x64 (both 32 and 64 bit modes)
  • Google Android
  • Apple iOS / iPhone / iPad & MacOS
  • Unix,  Linux, μClinux, BSD
  • Microsoft Windows ACM / RTC / CE / Mobile
  • Symbian
  • eCOS / eCOSPro
  • Wind River VxWorks
  • Green Hills Integrity
  • Micrium μCOS