Applications:
Video | Audio
| Voice | Image
| IDE
Voice
Coding
With the knowledge of algorithms and many years of experience in firmware
development, SEDA Solutions® has unique insight into many digital
voice processing applications and their transformations onto floating
and fixed-point processor platforms. SEDA Solutions® unique understanding
of algorithm and system design allows us to address the challenges of
system hardware down to the algorithm level. SEDA Solutions® has
designed many algorithms based on clients' specific needs and system
requirements. Such algorithms have been implemented and incorporated
in home consumer electronics worldwide.
Proprietary
Voice Algorithms
Below are
examples of some of our most successful in-house designed algorithms
in today's everyday use:
Flexpeech®
Compression Overview
SEDA Solutions'®
Flexpeech® compression technology is a flexible voice and speech
compression technology that allows a number of system design parameters
to be adaptive and variable without noticeable loss of quality. Every
vocoder design must achieve a balance between voice quality, device
complexity and bandwidth efficiency. Device complexity includes requirements
for processor speed, memory size and allowable delay. Flexpeech®
is designed to smoothly integrate with other system design parameters
at any point in the system design. The main features of Flexpeech®
are:
- High compression
quality
- High to mid-low
compression rates
- Multi-rate system
- Variable rate
system
- Robust to channel
errors
- Low memory requirement
Flexpeech® is
based on a mixture of frequency and time-based CELP-like technique.
It provides very high quality compression with any setting for any of
the configurable parameters. The system operates from bit rates as high
as 16000 bps to as low as 3000b/s and has Multi-Rate capability that
is controlled by outside system parameters. It also operates in a Variable-Rate
mode and can be configured to be variable in complexity and processor
requirements, controlled by outside system parameters. The system is
designed to be tolerant in the presence of channel errors.
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FlexiTAD®
Storage Overview
FlexiTAD®
is a unique patent pending algorithm embedded in telephone answering
device (TAD) technology that employs variable time recording to deliver
adaptive, efficient and reliable playback systems with the highest quality
output.
FlexiTAD® integrated
Flexpeech® produces a proprietary storage method where the memory
configuration gives an already-compressed bit stream output of multiple
levels. Thus, if the system is running low in memory, it automatically
discards high bit rate data and retains the low bit rate information.
FlexiTAD® provides superior performance in playback quality and
for a given storage capacity. No additional memory is required by the
system relative to the methodologies mentioned above.
TalkBack
Overview
TalkBack
utilizes voice compression technology that requires less than 150 MOPS
of arithmetic instructions and less than 300 bytes of data RAM. The
low complexity feature of this playback algorithm allows implementation
on a fairly simple, low-cost processor, keeping expense and power consumption
low, making it ideal for portable consumer end products. The current
version of TalkBack compresses the speech signal to as low as 5000 bps.
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Standard
Voice Algorithms
Below are
some of the examples of standard codecs previously implemented at SEDA
Solutions®;
-
G.711
- G.726
- G.728
- G.729
.......
+ Annex A
.......
+ Annex B
- G.723.1
........
+ Annex A
- GSM
- AMR
........
+ FEC
- GSM
- Full Rate
.........
+ FEC
- GSM
- Half Rate
.........
+ FEC
- CDMA
- EVRC
- PDC
Full Rate VSELP
.........
+ FEC
- PDC
Half Rate PSI-CELP
..........
+ FEC
For more information
on Audio related products and services please contact us by email at
info@sedasolutions.com.