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DSP Speech Synthesis Feature Extraction | Audio …
At least a fully invisible Bluetooth hands free solution!
Technical and commercial specifications
Color TFT 2.4
External double microphone, direction is adjustable
DSP-3: Echo cancellation, advanced noise reduction
Dispatch voice and music on cars speakers
Multiple connectors: iPods (from fifth generation),
USB and Line-In
Play music from any Bluetooth Stereo (A2DP) compatibles devices
Digital Class-D 20W amplifier
Automatic phonebook synchronization
User-independent voice recognition
Text To Speech: vocal synthesis of the
Number of contacts: up to 8,000 in total;
up to 1,500 per paired phone
Microprocessor Parrot5 (32 bits) at 208MHz
Memory: Flash = 32 Mbits RAM = 16Mbits
Computer generation and recognition of speech are formidable problems; manyapproaches have been tried, with only mild success. This is an active area ofDSP research, and will undoubtedly remain so for many years to come. Youwill be very disappointed if you are expecting this section to describe how tobuild speech synthesis and recognition circuits. Only a brief introduction to thetypical approaches can be presented here. Before starting, it should be pointedout that most commercial products that produce human sounding speech do not it, but merely play back a digitally recorded segment from a humanspeaker. This approach has great sound quality, but it is limited to theprerecorded words and phrases.
Speech and DSP Software - University of Delaware
Over a short period, say 25 milliseconds, a speech signal can be approximatedby specifying three parameters: (1) the selection of either a periodic or randomnoise excitation, (2) the frequency of the periodic wave (if used), and (3) thecoefficients of the digital filter used to mimic the vocal tract response. Continuous speech can then be synthesized by continually updating these threeparameters about 40 times a second. This approach was responsible for one theearly commercial successes of DSP: the , a widely marketedelectronic learning aid for children. The sound quality of this type of speechsynthesis is poor, sounding very mechanical and not quite human. However, itrequires a very low data rate, typically only a few kbits/sec.
LPC Analysis and Synthesis of Speech - MATLAB & …
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