DETECTION OF TRANSMISSION ERRORS IN BLOCK CODED IMAGES
Jarmila Pavlovičová - Jaroslav Polec - Milan Keleši - Martin Mokoš
The effect of cell loss or random bit error during transmission causes image
degradation in the case of highly compressed images serious. We use ARQ
(Automatic Repeat reQuest) as the error control scheme. Conventional ARQ uses an
error detection code (Cyclic Redundancy Check - CRC) to trigger retransmission.
Retransmission of all bit errors is not efficient. To improve the throughput, we
use an ARQ scheme that detects only those channel errors that would cause
serious image degradation - Side Match Test (SMT) . In this study we use the
SMT in JPEG and VQ (Vector Quantization) coded images transmitted through an
independent symmetric binary transmission channel without memory.
Keywords: error detection, JPEG, vector quantization, independent symmetric binary transmission channel without memory