ibm - cvut student research projects compression algorithm for wireless microphone michal přibyl...
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IBM - CVUT Student Research Projects
Compression Algorithmfor Wireless Microphone
Michal Přibyl ([email protected])
IBM - CVUT Student Research Projects
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Goals
• Compare available audio compression algorithms
• Choose suitable codec for dsPic30 i. e. compression with low complexity
• Implement this audio compression library in C for dsPic30 and PC
IBM - CVUT Student Research Projects
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Wireless Microphone Specification
• Sampling rate: 16 kHz
• Data width: 16 bits
• Transmitting protocol: Bluetooth
IBM - CVUT Student Research Projects
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Wireless Microphone Architecture by Petr Mohelský
Codec+
Microprocessor
BT modulRS 232
PCUSB BTDongle
(COM 4)
BT signal
Serial comunication
software
Soundsoftware
Soundcard
Microphone
IBM - CVUT Student Research Projects
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Accomplished goals
• ComparisonDue the algorithm complexity was chosen Sub Band Codec (SBC) defined by the Advanced Audio Distribution Profile Specification v1.0
• ImplementationFinished lower level of SBC consisting of ADPCM compression.
IBM - CVUT Student Research Projects
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Thank you for your attention