ZR36016 Просмотр технического описания (PDF) - Zoran Corporation

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ZR36016

INTEGRATED COLOR SPACE / RASTER-TO-BLOCK CONVERTER

Zoran Corporation 

Integrated Color Space / Raster-To-Block Converter

Hardware Interfaces

Image Input/Outputs

SYSCLK and PXCLK

The ZR36016 requires two system clocks: PXCLK, at the data

rate of the pixel buses, and SYSCLK, at the data rate of the

ZR36050 interface. The frequency ratio of PXCLK to SYSCLK

depends on the compressed image format and other setup

register bits, as shown in Table 8.

For some of the configurations shown in the table, the PXCLK to

SYSCLK frequency ratio is 1. When this happens, the output

pixel bus, PXOUT, is actually clocked with SYSCLK. PXCLK, at

the same rate as SYSCLK, is still required, however, to clock the

input pixel bus PXIN, and for reset and other operations.

When the HORZ setup register bit is set, for horizontal decima-

tion or interpolation, there are in most cases two options for the

PXCLK to SYSCLK frequency ratio as selected by the CKRT bit

of Setup Register 1.

Table 8: Ratio of PXCLK to SYSCLK

HORZ

ZR36050 Image

Format

Bit

Decimation/

Interpolation [1]

Y

CB/CR

VERT

Compression Format and

Resolution

4:2:2

1

x

x

1

2:1:1 (Quarter Screen)

4:2:2

1

x

x

0

2:1:1 (Horizontal Half-Screen)

4:2:2

0

–

–

1

4:2:2 (Vertical Half-Screen)

4:2:2

0

–

–

0

4:2:2 (Full-Screen)

4:1:1 (H4V1)

1

x

–

1

2:1:1 (Quarter Screen)

4:1:1 (H4V1)

1

x

–

0

2:1:1 (Horizontal Half-Screen)

4:1:1 (H4V1)

0

–

–

1

4:1:1 (Vertical Half-Screen)

4:1:1 (H4V1)

0

–

–

0

4:1:1 (Full-Screen)

4:1:1 (H2V2)

–

–

–

–

4:1:1 (Full-Screen)

4:4:4

1

Each Component

1

2:2:2 (Quarter Screen)

4:4:4

1

Each Component

0

2:2:2 (Horizontal Half-Screen)

4:4:4

0

–

–

1

4:4:4 (Vertical Half-Screen)

4:4:4

0

–

–

0

4:4:4 (Full-Screen)

4:4:4:4

1

Each Component

1

2:2:2:2 (Quarter Screen)

4:4:4:4

1

Each Component

0

2:2:2:2 (Horizontal Half-Screen)

4:4:4:4

0

–

–

1

4:4:4:4 (Vertical Half-Screen)

4:4:4:4

0

–

–

0

4:4:4:4 (Full-Screen)

4:0:0 (1:0:0)

1

x

–

1

2:0:0 (Quarter Screen)

4:0:0 (1:0:0)

1

x

–

0

2:0:0 (Horizontal Half-Screen)

4:0:0 (1:0:0)

0

–

–

1

4:0:0 (Vertical Half-Screen)

4:0:0 (1:0:0)

0

–

–

0

4:0:0 (Full-Screen)

1. x = Decimation/Interpolation is performed on these components; – = Not performed or not applicable.

PXCLK to SYSCLK

Frequency Ratio

CKRT

0

1

1/2

1

1/2

1

1/2

1/2

1/2

1

1/2

1

1/2

1/2

1/2

1/4

1/2

1/4

1/2

1/4

1/4

1/2

1

1/2

1

1/2

1/2

1

1

1

1

10

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