Sökning: "vector quantization"

Visar resultat 6 - 10 av 31 avhandlingar innehållade orden vector quantization.

1. 6. On Soft Decoding and Robust Vector Quantization

   Författare :Mikael Skoglund; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; speech and image coding; intersymbol interference; Rayleigh fading; soft decoding; CDMA; index assignment; Hadamard transform; channel optimized VQ; robust VQ; combined source-channel coding; vector quantization VQ ; noisy channels;

   Sammanfattning : This thesis considers vector quantization for noisy channels. Vector quantization (VQ) is an important technique for block-based source coding, with applications in, e.g., speech and image coding. LÄS MER

3. 7. Quantization of speech parameters : some studies in glottal pulse and spectrum coding

   Författare :Jan Skoglund; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; glottal codebook; glottal source modeling; spectrum coding; vector quantization; speech coding; memory vector quantization; excitation coding;

   Sammanfattning : .... LÄS MER

4. 8. On error-robust source coding with image coding applications

   Författare :Tomas Andersson; Mikael Skoglund; Astrid Lundmark; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; source coding; channel coding; joint source-channel coding; multiple description coding; image coding; vector quantization; channel optimized vector quantization; Telecommunication; Telekommunikation;

   Sammanfattning : This thesis treats the problem of source coding in situations where the encoded data is subject to errors. The typical scenario is a communication system, where source data such as speech or images should be transmitted from one point to another. A problem is that most communication systems introduce some sort of error in the transmission. LÄS MER

5. 9. Vector Quantization in Speech Coding. Variable Rate, Memory and Lattice Quantization

   Författare :Thomas Eriksson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : This dissertation focuses on different quantization methods in speech coding. Variable rate quantization has the potential to substantially reduce the bit rate requirements in speech coding. LÄS MER

7. 10. On speech spectrum coding : interframe memory and perception

   Författare :Fredrik Nordén; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; speech coding; memory based quantization; distortion measure; vector quantization; spectrum coding; speech perception;

   Sammanfattning : .... LÄS MER