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SPEECH COMPRESSION AND DECOMPRESSION USING ADPCM TECHNIQUE


Posted by: seminar class
Created at: Saturday 05th of March 2011 12:02:37 AM
Last Edited Or Replied at :Wednesday 06th of April 2011 04:06:03 AM
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lesser number of bits.
 In compression technique the 13 to 16 bits data is represented by an equivalent of 4 or 8 bits.
 In decompression technique the compressed data is converted back to original data.
BLOCK DIAGRAM
HARDWARE

 Efficient hardware is developed by this project to implement the powerful and versatile ADPCM speech compression and decompression algorithm.
 The hardware has been developed using powerful DSP processor ADSP-2105.
 The speech processing system consists of ADSP-2105,CODEC,EPROM,RAM,Amplifier sections,mike and speakers.
FUNCTIONING
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speech compression using GSM RPE-LTP


Posted by: savitha p s
Created at: Friday 25th of February 2011 04:45:06 AM
Last Edited Or Replied at :Friday 25th of February 2011 04:51:46 AM
speech compression ,
regarding the topic.and finally the application of the topic.
thanking you,





yours faithfully,
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speech compression by novel method


Posted by: suseela
Created at: Monday 24th of January 2011 01:26:12 AM
Last Edited Or Replied at :Tuesday 25th of January 2011 12:32:00 AM
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can u plzz send me full report on speech co..................[:=> Show Contents <=:]



A NOVEL METHOD OF COMPRESSING SPEECH WITH HIGHER BANDWIDTH EFFICIENCY


Posted by: seminar surveyer
Created at: Thursday 07th of October 2010 06:22:59 AM
Last Edited Or Replied at :Thursday 02nd of April 2015 05:58:55 AM
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andwidth.

Also the simulation result of this method shows that smaller the size of the packet the more faithful is the reproduction of received signal that is again an advantage as the computation time is reduced. The reduction in the computation time is due to the fact that the transmitter has to wait until N samples are obtained before starting the transmission. If N is small, the transmitter has to wait for a less duration of time and a smaller value of N achieves a better reconstruction at the receiver.
Thus this scheme provides a more efficient method of speech compression and thi..................[:=> Show Contents <=:]



Speech Compression using GSM RPE-LTP full report


Posted by: seminar topics
Created at: Sunday 21st of March 2010 12:04:31 AM
Last Edited Or Replied at :Sunday 27th of March 2011 10:48:13 AM
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redictable signal from its input, the algorithm then subtracts the scaled 40 samples. The residual signal is either weak or random and consequently cheaper to encode and transmit.
The algorithm down-samples by a factor of three, discarding two out of three sample values. Results in four evenly spaced 13-value subsequences to choose from, starting with samples 1, 2, 3, and 4. The algorithm picks the sequence with the most energy. That leaves us with 13 3-bit sample values and a 6-bit scaling factor that turns the PCM encoding into an APCM
19

Speech Decoder

Decoder consists of thre..................[:=> Show Contents <=:]



f IMAGE COMPRESSION USING BIORTHOGONAL 37 WAVELET TRANSFORMS


Posted by: M.swetha reddy
Created at: Saturday 09th of January 2010 08:51:31 PM
Last Edited Or Replied at :Monday 11th of January 2010 04:55:47 AM
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please send me the complete information on wavelet transform for image compr..................[:=> Show Contents <=:]



Speech Compression - a novel method


Posted by: computer science crazy
Created at: Tuesday 07th of April 2009 01:21:25 PM
Last Edited Or Replied at :Friday 09th of September 2011 11:09:24 PM
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signal. In other methods of speech compression, the specific characteristics of the source such as pitch are important for the algorithm to work. An exact reverse process at the receiver reconstructs the samples. At the receiver, the N-point IDFT of the received signal is performed after necessary zero padding. Zero padding is necessary because at the transmitter of the N samples only N samples are transmitted, but at the receiver N samples are again needed to honestly reconstruct the signal.

Hence this method is efficient as only a portion of the total number of samples is transmitted the..................[:=> Show Contents <=:]



Speech Compression - a novel method


Posted by: Computer Science Clay
Created at: Sunday 01st of March 2009 02:22:51 AM
Last Edited Or Replied at :Sunday 01st of March 2009 02:22:51 AM
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this problem. The spect..................[:=> Show Contents <=:]



Speech Compression - a novel method


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 12:07:13 AM
Last Edited Or Replied at :Sunday 21st of September 2008 12:07:13 AM
method , novel, Compression , Speech,
on is embedded within the magnitude spectrum and it is needed only to send 'aN' samples instead of '2N'samples of the spectra (Magnitude and phase).

Adopting all these procedures and embedding the phase information ..................[:=> Show Contents <=:]



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