M65727FP Просмотр технического описания (PDF) - MITSUBISHI ELECTRIC

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M65727FP

MPEG2 MOTION ESTIMATION LSI

MITSUBISHI ELECTRIC  

DISTRIBUTION RESTRICTED. COPYRIGHT RESERVED 1995

Frame Mode (per frame)

*Block size

16x16 and 16x8 (Top*), 16x8 (Bottom**) simultaneously

*Search range

Vertical direction: ±7.5(*A) / ±15.5 pixel (Switchable)

It corresponds to 2 sets of fields each ±3.5 pixel / ±7.5 pixel location for

16x8 blocks.

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)

*Search methods 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 Depends 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) (550) cycles/ ΜΒ

ex. 2 (Horizontal ±15.5, vertical ±7.5) (550) ∗2 cycles / ΜΒ

ex. 3 (Horizontal ±7.5, vertical ±15.5) (806) cycles / ΜΒ

ex. 4 (Horizontal ±15.5, vertical ±15.5) (806) ∗2 cycles / ΜΒ

∗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.

*, **: "Top" and "Bottom" mentioned here indicate the field parities. In the

following explanation, a frame with the top field side as the first line is assumed.

*A: The mode of vertical search range is ±7.5 can be used only under 27MHz

operation.

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