-2 -259 PROCESS AND APPARATUS FOR CONVERTING AN MPEG-2 BITSTREAM INTO AN SMPTE-259 COMPATIBLE BITSTREAM

摘要

A method and apparatus for converting an MPEG-2 bitstream to an SMPTE-259 compatible bitstream uses a frame rate converter that is selectively enabled to discard every 1001th frame of the incoming MPEG-2 bitstream according to the input bitstream frame rate. It features. If the input bitstream frame rate is not 29.97 Hz or 59.94 Hz, the frame discard is enabled to discard every 1001th frame. The converter can convert many different types of input bitstreams, such as all I types, IPIP types, or complex GOP types including I, P, and B frames. An enabled frame discarder will discard either the I or P frame if an I or P frame occurs as the 1001 th frame, but if the 1001 th frame is a B frame type, the pixel information of the B frame is Abandoned. This results in minimal information loss during conversion. The shape converter allows existing SMPTE-259 delivery devices to deliver and use MPEG-2 bitstreams, such as HDTV applications.