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(yè)數(shù)： 4/55頁(yè)
文件大?。?/td> 242K
代理商： M65727FP
DISTRIBUTION RESTRICTED. COPYRIGHT RESERVED 1995
CONTACT MITSUBISHI ELECTRONICS REGARDING DISTRIBUTION
4
1. Outline
1.1 Outline
The M65727 is a highly efficient motion estimation LSI used to estimate motion vectors for real-time
encoding of dynamic images. M65727 can be used together with the frame memory, the M65721
(Controller LSI) and the M65722 (Pixel Processor LSI). It operates under the control of the M65721.
M65727 accepts the template macro block (MB) data inputs from the M65721 and accepts the search
window image data from the frame memory. It estimate the motion vectors by searching the minimum
value of the mean absolute error between template block data and search window image data. It outputs
the result to the M65721. The M65721 and the M65722 are able to generate prediction image using the
above mentioned motion vector. The M65727 is designed so that it is applicable to MPEG2, the
international video compression standard.
[Main Specifications]
Field Mode (per field)
*Block size
*Search range
16x16 and 16x8 (Upper), 16x8 (Lower) simultaneously
Vertical direction: ±7.5(*A) / ±15.5 pixel (Switchable)
However, ±8.0(*A) / ±16.0 are used during expansion respectively
Horizontal direction: ±7.5 / ±15.5 / ±31.5 / ±63.5 / ±127.5 pixel
(Selectable)
Integer-pel precision exhaustive search
Half-pel precision 9 points around the best integer-pel precision vector
(Including the integer precision location)
*Evaluation function Full sampled mean absolute error
*Execution cycle
Dependent on the search range
The execution cycle mentioned here refers to the throw-in period of MB,
not the 1MB processing time.
ex. 1 (Horizontal ±7.5, vertical ±7.5)
ex. 2 (Horizontal ±15.5, vertical ±7.5)
ex. 3 (Horizontal ±7.5, vertical ±15.5)
ex. 4 (Horizontal ±15.5, vertical ±15.5) (806
) 2
*Search window image inputs
When vertical ±7.5 is searched: 512 pixels / (550
)
cycles
When vertical ±15.5 is searched: 768 pixels / (806
)
cycles
*Processing capability
27MHz operation:
Processing the search range over horizontal ±7.5 and
vertical ±7.5 for the ITU-R 601 image size is possible.
40MHz operation:
Processing the search range over horizontal ±7.5
and vertical ±15.5 for the ITU-R 601 image size is possible.
*Search methods
(550
)
(550
) 2
(806
)
cycles
/ ΜΒ
cycles
/ ΜΒ
cycles
/ ΜΒ
cycles
/ ΜΒ
*A: The mode of vertical search range is ±7.5 can be used only under 27MHz
operation.
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