ONM system coding and decoding device for digital video data stream compression

We present method for digital video data stream compression over television channel for ONM system. Proposed method is based on researching of psychophysical features of human vision. This approach provides better results for visual quality in comparison to conventional standard MPEG-2. Here we divide sequence of fields (half-frames) into 3 groups. There 3 types of fields in the each group. O-fields are image field, which is base during reconstruction of other images. O-fields use intra-field coding, and predictions for O-fields are not formed. N-even-fields are images coded by prediction based on the previous field. N-fields utilize intra-field coding that produces line difference of two neighbor lines of even and odd fields. M-odd-fields are coded under prediction based on previous odd-filed from other frame. Even and odd fileds are replaced together over all video or frame of group to improve visual quality of image. That provides to frames with higher resolution and improving of image quality. This work also discusses practical realization of ONM system, coding scheme and decoding devices. We present their detailed descriptions and comparison analysis of known systems based on MPEG-compression together with methods for improving of compression effectiveness for digital video data stream over television channel.