M65727FP Просмотр технического описания (PDF) - MITSUBISHI ELECTRIC

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M65727FP

MPEG2 MOTION ESTIMATION LSI

MITSUBISHI ELECTRIC  

DISTRIBUTION RESTRICTED. COPYRIGHT RESERVED 1995

Table 3 Relationship between Field Dual-Prime Estimation Mode and Its Output Data

Output sequence

Minimum evaluation value (Upper 8bits)

1

2

Minimum evaluation value (Lower 8bits)

3

dmv indication code

Table 4 Relationship between Frame Dual-Prime Estimation Mode and Its Output Data

Output Minimum evaluation value (Upper) Output sequence Left evaluation value (Upper)

sequence

12

1

2

Minimum evaluation value (Lower)

13

Left evaluation value (Lower)

3

dmv indication code

14

Right evaluation value (Upper)

4

Center evaluation value (Upper)

15

Right evaluation value (Lower)

5

Center evaluation value (Lower)

16

Left lower evaluation value (Upper)

6

Left upper evaluation value (Upper)

17

Left lower evaluation value (Lower)

7

Left upper evaluation value (Lower)

18

Lower evaluation value (Upper)

8

Upper evaluation value (Upper)

19

Lower evaluation value (Lower)

9

Upper evaluation value (Lower)

20

Lower right evaluation value (Upper)

10

Right upper evaluation value (Upper)

21

Lower right evaluation value (Lower)

11

Right upper evaluation value (Lower)

Note 1:

Note 2:

The evaluated values are output using the natural binary number. First, the upper 8 bits are

output and the lower 8 bits are output next.

The dmv indication code is specified using the lower 4 bits as shown below. The upper 4

bits are for L output.

0000: The center point vector is optimum

(+0.0, +0.0)

1010: Upper left from the center point vector

(-0.5, -0.5)

1001: Upper right from the center point vector

(+0.5, -0.5)

0110: Lower left from the center point vector

(-0.5, +0.5)

0101: Lower right from the center point vector

(+0.5, +0.5)

0010: Left of the center point vector

(-0.5, +0.0)

0001: Right of the center point vector

(+0.5, +0.0)

1000: Upper direction from the center point vector

(+0.0, -0.5)

0100: Lower direction from the center point vector

(+0.0, +0.5)

3.3.8 Operational Modes and Dynamic Control Signals (for each processing cycle)

M65727 has controls which need to change every execution cycle. These controls differ according

to operational modes as shown below. They are input to the chip through DCNT pins when DSYNC is

asserted. One assertion is needed for each information write into the chip. Therefore, when a mode

needs multiple control information, DSYNC must be asserted multiple times. DSYNC is asserted

low.

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17

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