Converter for converting H.261 video codec having common intermediate format into ITU-R 601 format

摘要

The present invention relates to a conversion apparatus for converting an H.261 video codec having a form of a common intermediate format (hereinafter, referred to as 'CIF') into an ITU-R 601 form. Is reset, the data of the luminance component is inputted from the H.261 codec in synchronization with the write clock by the write signal, stored therein, and the read process is reset by the read reset signal. First, second frame memory means (12, 13); First and second multiplexing means (10, 11) for receiving data of chromaticity components from the H.261 codec and enabling and multiplexing and outputting the data by means of an external selection signal; And a write process of the output of the first and second multiplexing means 10 and 11 is reset by a write reset signal. The write process of the first and second multiplexing means 10 and 11 is input and stored in synchronization with the write clock. And third and fourth frame memory means 14 and 15 for outputting in synchronism with the read clock by the read signal, and to output a signal of a device having a non-parallel scanning CIF image format to a TV screen. There is an effect that can be used as a video output conversion apparatus of a videoconferencing terminal using an H.261 video codec by converting to an intermediate ITU-R 601 digital common format.