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| 型號： | 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)動估計 |
| 文件頁數(shù)： | 27/55頁 |
| 文件大?。?/td> | 242K |
| 代理商： | M65727FP |
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DISTRIBUTION RESTRICTED. COPYRIGHT RESERVED 1995
CONTACT MITSUBISHI ELECTRONICS REGARDING DISTRIBUTION
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The number of chips needed for the expanded vertical search range (±16/±32 or more) is shown
below. It is not allowed to use odd number of chips for expanded vertical search range.
When ±7.5 is specified for one chip vertical search range,
±16.0:
2 chips
±32.0:
4 chips
±64.0:
8 chips
When ±15.5 is specified for one chip vertical search range,
±32.0:
2 chips
±64.0:
4 chips
±128.0:
8 chips
Fig. 5.5-3 shows the conditions needed for the control of expanded vertical search range. Fig. 5.5-4
shows the relation between output vertical vector and real vertical vector.
When both horizontal and vertical ranges are expanded, the product of the number of chips needed for
the above search ranges becomes the number of chips needed.
5.6 Operational Timing
Data (Control) sent to M65727 must be done within pre-determined execution cycles. If data
(Control) I/O is performed during different execution cycles , operations of M65727 is not guaranteed.
Fig. 5.6-1 shows the operational timing of M65727.
5.7 Treatment of Final MB
The M65727 is designed so that it processes successive MB horizontally. So, the special treatment is
required for final MB (when the horizontal search range expansion by multi-chip, each final MB
processed in each M65727 requires special treatment).
The special treatment means that the user must input every control and data to M65727 as extra
(dummy) successive MB will be processing until the out-put of final MB is finished.
5.8 Mode Change during Processing
The sequence of mode change during processing shows below.
· Finish the output of necessary MB in previous mode
· Change the operation mode by mode pins
· Reset the M65727
· Input control and data for new operation mode
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