发明名称 |
PROCESS AND APPARATUS FOR CONVERTING AN MPEG-2 BITSTREAM INTO AN SMPTE-259 COMPATIBLE BITSTREAM |
摘要 |
<p>A process and apparatus for converting an MPEG-2 bistream into an SMPTE-259 compatible bitstream are characterized by a frame rate converter which is selectively enabled to drop every 1001st frame of the incoming MPEG-2 bitstream depending on the input bitstream frame rate. If the input bitstream frame rate is other than 29.97 or 59.94 Hz, a frame dropper is enabled to discard every 1001st frame. The present converter can convert many different types of input bitstreams, such as all I types, IPIP types, or complex GOP types containing I, P, and B frames. The enabled frame dropper will drop either the I or P frame if it occurs as the 1001st frame, but if the 1001st frame is of the B frame type, the pixel information of the B frame is dropped. This produces a minimum in loss of information during the conversion. The format converter allows existing SMPTE-259 routing equipment to route and utilize MPEG-2 bitstreams, such as HDTV applications.</p> |
申请公布号 |
WO9933268(A1) |
申请公布日期 |
1999.07.01 |
申请号 |
WO1998US26917 |
申请日期 |
1998.12.19 |
申请人 |
THOMSON CONSUMER ELECTRONICS, INC. |
发明人 |
BHATT, BHAVESH, BHALCHANDRA;JONSSON, RAGNAR, HLYNUR |
分类号 |
H04N7/32;H04N5/44;H04N5/46;H04N7/01;H04N7/26;H04N7/52;H04N11/20;H04N21/2343;H04N21/242;(IPC1-7):H04N7/01 |
主分类号 |
H04N7/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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