Noise Reduction

THE NOISE REDUCTION ALGORITHM ENHANCE SPEECH TO THE LISTENER

Noise reduction algorithms is available in both a standard version and a low complexity version.

Features List

  • User configurable

  • Enhances Voice Quality (improves Mean Opinion Score)

  • Functions are C-callable

  • Designed for multiple channel operation

  • Reduces background noise whether or not speech is present thereby increasing the signal-to-noise ratio

  • Reduces amplitude of tonal signals whether or not speech is present

  • Reduces amplitude of most siren signals with moving tonal content

Note: Adaptive Digital’s Noise Reduction, a second generation product is sometimes referred to as NR G2, or NR Gen 2.

Availability

Platforms
Arm ® Devices Cortex-A8 / A9 / A15, Cortex-M3 / M4 / M7 | Legacy ARM9E/11
Texas Instruments – TI TMS320C6000 C64x/C64x+/C66x, C674x, TMS320C5000 C55x / C54x
Windows DLL x86
Linux x86

ADT Noise Reduction is available on the above platforms: Other configurations are available upon request.

Specifications

Note: All CPU usage given in MIPS (also known as MCPS or MHz)

Noise Reduction C64x, C64x+ / C66x / C674x

CPU UTILIZATION & MEMORY REQUIREMENTS
All Memory usage is given in units of byte.
VarientMIPS (Peak)Program MemoryScratchTablesPer-Channel Mem
C64x14.1375365670433211960
C64x+ / C66x / C674x13.8306565670433211960

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Noise Reduction C55x

CPU UTILIZATION & MEMORY REQUIREMENTS
All Memory usage is given in units of byte.
FunctionMIPS (Peak)Program MemoryScratchTablesPer-Channel Mem
Reduce20117317720330811976

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Note: All CPU usage given in MIPS (also known as MCPS or MHz)

NR ARM Cortex-A8 / A9 / A15

CPU UTILIZATION & MEMORY REQUIREMENTS
All Memory usage is given in units of byte.
FunctionMIPS (Peak)Program MemoryData MemoryScratch MemoryPer-Channel Mem
Reduce32.568.2k21785668/1196

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Noise Reduction ARM Cortex-M4

CPU UTILIZATION & MEMORY REQUIREMENTS
All Memory usage is given in units of byte.
Sampling RateMIPS (Peak)Program MemoryDataScratchPer-Channel Mem
16 kHz19.4k198443176433212056
8 kHz38.8k

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Note: All CPU usage given in MIPS (also known as MCPS or MHz)

Noise Reduction Win32

CPU UTILIZATION & MEMORY REQUIREMENTS
All Memory usage is given in units of byte.
FunctionMIPS (Peak)Program MemoryData MemoryScratch MemoryPer-Channel Mem
Reduce3648k2156119615670

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Description

The Adaptive Digital noise reduction (NR) software reduces background noise in speech signals under such circumstances where the background sound intensity levels are high. The algorithm can be customized to trade off between complexity, memory requirements, and required noise reduction.  

The user can configure noise cancellation to be more or less aggressive. Less aggressive settings reduce noise by a moderate amount while more aggressive settings reduce noise by a greater degree.

Applications

Noise reduction is an excellent choice for applications with high background noise environments. Applications include traditional, mobile, and hands-free telephone systems, conferencing, speech recognition, and alarm systems. 

Function API's​

API function call summary

NCAN_ADT_init( . . .) Initiates a channel of Noise Cancellation

NCAN_ADT_reduce( . . . ) Executes Noise Cancellation

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