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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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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
 The speech segment to be compressed is fed as input ..................[:=> Show Contents <=:]



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 ,
using GSM RPE-LTPas my seminars topic.so what ever the infomation you ..................[:=> Show Contents <=:]



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 compression..................[:=> 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 07th of October 2010 06:22:59 AM
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h signal. Also this method applies equally well for any signal, which is low pass in nature, speech being the more widely used in Real Time Communication, is highlighted here.

As per this method, the low pass signal (speech) at the transmitter is divided into set of packets, each containing, say N number of samples. Of the N samples per packet, only certain lesser number of samples, say N alone are transmitted. Here  is less than unity, so compression is achieved. The N samples per packet are subjected to a N-Point DFT. Since low pass signals alone are considered here, the numbe..................[:=> 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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hrough the tubes of the simulated vocal tract--and emerges as speech
22

QUESTIONS

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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 com..................[:=> 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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e 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 this scheme is also very easy to implement with the help of available high-speed processors.Transmitting the spectrum of the signal instead of transmitting the original signal is far more efficient. This is because the energy of the speech signal above 4 kHz is negligi..................[:=> 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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ing. 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 thereby saving the bandwidth. Since the frequency samples are transmitted the phase information has also to be transmitted. Here again by exploiting the property of signals and their spectra that the PHASE INFORMATION CAN BE EMBEDDED WITHIN THE MAGNITUDE SPECTRUM by using simple mathematics without any heavy co..................[:=> 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,
rtain lesser number of samples, say N alone are transmitted. Here is less than unity, so compression is achieved. The N samples per packet are subjected to a N-Point DFT. Since low pass signals alone are considered here, the number of significant values in the set of DFT samples is very limited. Transmitting these significant samples alone would suffice for reliable transmission. The number of samples, which are transmitted, is determined by the parameter .

The parameter is almost independent of the source of the speech signal. In other methods of speech compression, the specific character..................[:=> Show Contents <=:]



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