參數(shù)資料
型號(hào)： M65727FP
廠商： Mitsubishi Electric Corporation
英文描述： MPEG2 MOTION ESTIMATION LSI
中文描述： 大規(guī)模集成電路的MPEG2運(yùn)動(dòng)估計(jì)
文件頁數(shù)： 25/55頁
文件大?。?/td> 242K
代理商： M65727FP
DISTRIBUTION RESTRICTED. COPYRIGHT RESERVED 1995
CONTACT MITSUBISHI ELECTRONICS REGARDING DISTRIBUTION
25
[integer-pel precision vector]
The vector, whose horizontal position isn't most left in a search range of the current execution
cycle is invalidated.
[half-pel precision vector]
When the vector, whose horizontal position is most left in a search range of the current execution
cycle, is selected as the best integer-pel precision vector, the half-pel vector, whose horizontal
component is positive, is invalidated.
When the horizontal search range is ±15.5 or more, it is prohibited to specify the search left and the
search right at the same time except specifying all invalid (See below). When the horizontal search
range is ±15.5 or more, if all of the search range is made invalid(All invalid) (DCNT [3:0]: 1111) by
SKILL information, M65727 will make all the motion vector of the said search range invalid. It is
possible to limit the range by combining the above mentioned SKILL information.
*SKILL information used by Field/Frame Dual-Prime mode
When the top direction of a search range is made invalid by SKILL information (Search Top),
M65727 invalidates the Dual-Prime vector whose vertical component is negative. When the down
direction among the search range is specified as invalid by SKILL information (Search Down), M65727
makes the Dual-Prime vector of the search range invalid if its vertical component is positive.
When the left direction among the search range is made invalid by SKILL information (Search Left),
M65727 invalidates Dual-Prime vector of the search range if its horizontal component is negative. If
SKILL information specifies that the right direction among the search range is invalid (Search Right),
M65727 invalidates Dual-Prime vector of the search range whose horizontal component is positive.
5.2 Priority Order for Distortion Equivalent Vector
If there are multiple motion vectors which gives the minimum distortion, it is necessary to determine
the final motion vector by giving them priority order. M65727 decided on the following priority order
according to non-expansion / expansion upper range / expansion lower range.
*Priority order of the distortion equivalent vector for non-expansion
During the non-expansion mode, the distortion equivalent vector has the priority order given by the
following equation with Vector (0,0) as the highest priority location.
P (X, Y) = |X| + |Y|
The smaller the value of P (X, Y), the higher the priority.
*Priority order of the distortion equivalent vector for expansion upper
During the expansion upper range mode, the distortion equivalent vector uses Vector (0, +8/+16)
location as the top priority and uses the priority order given by the following equation.
P (X, Y) = |X| + (-Y+16)
The smaller the value of P (X, Y), the higher the priority.
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