Lect-22_07 - Lecture - 22 Quantization 27-02-2007 1 2 PCM...

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1 Lecture - 22 Quantization 27-02-2007
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2
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3 PCM Generation
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4 Problem with Uniform Quantization SNR is an indication of the quality of the received signal SNR is directly proportional to signal power and varies from talker to talker by as much as 40 dB. The signal power may vary depending on the connecting circuits. The quality of the received will vary when a person modulates his voice( when he talks softly). It is found that in speech signals smaller amplitudes predominate and larger amplitudes are less frequent. This is the problem one encounters when uniform quantization is employed. What is the solution? Non-uniform quantization
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5 Quantization – Uniform and non-uniform
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6 Quantization – Uniform and non-uniform
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7 A- law and µ - law Characteristics
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8 A- law and µ - law Characteristics
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9 A- law and µ - law Characteristics
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10 A-law compression scheme
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11 Companding Advantage
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12 PCM Transmission Bandwidth . In binary PCM we assign a distinct group of ‘n’ bits to each of
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This note was uploaded on 09/24/2010 for the course MATHEMATIC AAOC C222 taught by Professor Prof.dilipkumarsatpathi during the Fall '07 term at Birla Institute of Technology & Science, Pilani - Hyderabad.

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Lect-22_07 - Lecture - 22 Quantization 27-02-2007 1 2 PCM...

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