Process and apparatus for converting an mpeg-2 bit stream into a smpte-259 compatible bit stream

摘要

"PROCESS AND APPARATUS FOR CONVERTING A FLOW OF MPEG-2 BITS INTO A BIT FLOW COMPATIBLE WITH SMPTE-259" This is a process and apparatus for converting an MPEG-2 bit stream into an SMPTE-compatible bit stream 259 which are characterized by a frame rate converter that is selectively allowed to download each 1001 ° frame of the incoming MPEG-2 bit stream depending on the frame rate of the input bit stream. If the frame rate of the input bit stream is other than 29, 97 or 59, 94 Hz, a frame dropper is allowed to discard every 1001 ° frame. The present converter can convert several different types of input bit streams, such as all I types, IPIP types or complex GOP types counting I, P and B frames. The enabled frame lowerer will download the I or P frame if it occurs with the 1001st frame, but if the 1001st frame is frame type B, the pixel information from frame B is downloaded. This produces a minimum of information loss during the conversion. The format converter allows existing SMPTE-259 targeting equipment to target and use MPEG-2 bit streams, just like HDTV applications.