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RealTime Binaural Sound Generation Using TI C6713...
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Real-Time Binaural Sound Generation Using TI C6713 DSK Board Real-Time Binaural Sound Generation Using TI C6713 DSK Board Vaibhav Bhatnagar, Deepak John Advisor: Prof. Lawrence Hmurcik, Prof. Navarun Gupta Vaibhav Bhatnagar, Deepak John Advisor: Prof. Lawrence Hmurcik, Prof. Navarun Gupta Department of Electrical and Computer Engineering, University of Bridgeport, CT Department of Electrical and Computer Engineering, University of Bridgeport, CT . . Head Related Transfer Function (HRTF) Characterize the transformation of a sound source to the sounds reaching the ear drums, and are central to binaural hearing. Traditionally 3D sound generation involves the use of multiple speakers that are strategically placed, and have appropriate lags in the sounds emanating from them. Using HRTFs (Head Related Transfer functions, obtained from Florida International University), realistic binaural sounds can be generated using a pair of headphones. We are generating the binaural sound by using stereo filter implemented on DSK 6713, TI advanced starter kit. HRIR coefficient files, collected at FIU (Florida International University). Implemented by FIR (Finite Impulse Response) filters using convolution. Output in 2 channels, 12 HRTFs used # 0 0.5 1 1.5 2 2.5 3 x 10 -3 -0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3 0.4 0.5 HRIR of subject: XL Az = +30, El = +54 time (sec) magnitude Left Right 10 2 10 3 10 4 10 5 10 -2 10 -1 10 0 10 1 HRTFs of subject: XL Az = +30, El = +54 frequency (Hz) magnitude Left Right Figure 1, Head Related Impulse Response TMS320DSK6713DSP STARTER KIT TMS320C6713, developed by Texas Instruments, a 225 MHz device delivering up to 1800 million instructions per second (MIPs) and 1350 MFLOPS. It can deal with stereo channels, high-quality 24- bit stereo codec, 512K Flash and 16MB SDRAM. Embedded JTAG support via USB. Realistic results can be observed by pair of headphones It seems best for some direction (back of head), Others are not well. Because these are someone else’s HRTF’s HRTF’s can generate 3D sound using just a pair of headphones. How it goes around? Figure 2, Head Related Transfer Function
Transcript of RealTime Binaural Sound Generation Using TI C6713...
RealTime Binaural Sound Generation Using TI C6713 DSK BoardRealTime Binaural Sound Generation Using TI C6713 DSK Board Vaibhav Bhatnagar, Deepak John Advisor: Prof. Lawrence Hmurcik, Prof. Navarun GuptaVaibhav Bhatnagar, Deepak John Advisor: Prof. Lawrence Hmurcik, Prof. Navarun Gupta
Department of Electrical and Computer Engineering, University of Bridgeport, CTDepartment of Electrical and Computer Engineering, University of Bridgeport, CT..
Head Related Transfer Function (HRTF)
Characterize the transformation of a sound source to the sounds reaching the ear drums, and are central to binaural hearing.
Traditionally 3D sound generation involves the use of multiple speakers that are strategically placed, and have appropriate lags in the sounds emanating from them.
Using HRTFs (Head Related Transfer functions, obtained from Florida International University), realistic binaural sounds can be generated using a pair of headphones. We are generating the binaural sound by using stereo filter implemented on DSK 6713, TI advanced starter kit.
HRIR coefficient files, collected at FIU (Florida International University).
Implemented by FIR (Finite Impulse Response) filters using convolution.
Output in 2 channels, 12 HRTFs used
#
0 0.5 1 1.5 2 2.5 3
x 103
0.4
0.3
0.2
0.1
0
0.1
0.2
0.3
0.4
0.5
HRIR of subject: XLAz = +30, El = +54
time (sec)
mag
nitu
de
Left Right
102
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HRTFs of subject: XLAz = +30, El = +54
frequency (Hz)
mag
nitu
de
Left Right
Figure 1, Head Related Impulse Response
TMS320DSK6713DSP STARTER KIT
TMS320C6713, developed by Texas Instruments, a 225 MHz device delivering up to 1800 million instructions per second (MIPs) and 1350 MFLOPS.
It can deal with stereo channels, highquality 24bit stereo codec, 512K Flash and 16MB SDRAM. Embedded JTAG support via USB.
Realistic results can be observed by pair of headphones
It seems best for some direction (back of head), Others are not well.
Because these are someone else’s HRTF’s
HRTF’s can generate 3D sound using just a pair of headphones.
How it goes around?
Figure 2, Head Related Transfer Function
