A subjective evaluation of noise-shaping quantization for adaptive intra-/interframe DPCM coding of color television signals

Author

Girod, B. ; Almer, H. ; Bengtsson, L. ; Christensson, B. ; Weiss, Peter

Author_Institution

Institut fuer Theor. Nachrichtentech. & Inf., Hannover Univ., West Germany

Volume

36

Issue

3

fYear

1988

fDate

3/1/1988 12:00:00 AM

Firstpage

332

Lastpage

346

Abstract

Nonuniform quantizers for just-not-visible reconstruction errors in an adaptive intra-/interframe DPCM (digital pulse-code modulation) scheme for component-coded color television signals are presented, both for conventional and for noise-shaping DPCM. Noise feedback filters that minimize the visibility of reconstruction errors by spectral shaping are designed for Y, R-Y, and B-Y. A closed-form description of the masking function is derived which leads to a one-parameter b-quantizer characteristic. Subjective tests that were carried out to determine visibility thresholds for reconstruction errors for conventional DPCM and for noise shaping DPCM show significant gains by noise shaping. For a transmission rate of around 30 Mb/s, reconstruction errors are almost always below the visibility threshold if variable length encoding of the prediction error is combined with noise shaping within a 3:1:1 system

Keywords

encoding; filtering and prediction theory; noise; pulse-code modulation; video signals; 30 Mbits/s; DPCM; colour television signals; digital pulse-code modulation; encoding; masking function; noise feedback filters; noise shaping; noise-shaping quantization; prediction error; reconstruction errors; spectral shaping; visibility thresholds; Colored noise; Digital modulation; Encoding; Feedback; Filters; Noise shaping; Pulse modulation; Quantization; TV; Testing;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.1458

Filename

1458