M65762FP Просмотр технического описания (PDF) - MITSUBISHI ELECTRIC

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производитель

M65762FP

QM-CODER

MITSUBISHI ELECTRIC  

MITSUBISHI SEMICONDUCTOR (LSI)

M65762FP

QM-CODER

(5) Load/store processing sequence of line memory image data

2

d7

d0

Set System (Set LSI mode)

SYS_REG: Pb Pi Bx Bs Ds Cb Cb 0

Set Operation mode

Set Parameter *

(Selection of template)

MOD_REG:

Tp Li 0 0 LioLio 1 m

PARA_REG:

––t–––––

;Cb, Cb = Bit width of code data bus

;Ds = Bit swap of image data bus

;Bs, Bx = Code data bus bit, byte swap

;Pb, Pi = Bit width of image data bus, I/F selection

;m = Operation mode (selection of through mode)

;Lio, Lio = 01 or 10 (selection of load or store)

;Li = 1 (selection of prohibition of line memory

initialization)

;Tp = Typical prediction function ON/OFF (Note 1)

;t = Selection of template

Set number of pixels *

Set number of lines (= 2)

PEL_REG_L :

PEL_REG_H:

LSET_REG_L :

LSET_REG_H:

pel_l

00

pel_h

lset_l

lset_h

;pel_l, pel_h = Number of pixels per line

lset_l, lset_h = 2 (Number of processed lines)

(Note 2)

Set scale-up/scale down *

Processing start command

(Load/store into line memory)

CONV_REG:

0 0 0 HoHrVrHeVe

CMD_REG:

00000010

;Ve, He = Selection of scale-up during

decoding

;Vr, Hr, Ho = Selection of scale-down

during coding

;Load/store processing start command of

image data

Set interrupt enable

IENB_REG:

00000001

;Process end interrupt enable

*Settings of template selection, number of pixels per line, selection of scale-up/scale-down and

typical prediction function must meet the settings at time of stripe coding/decoding to be carried

out after this.

[Performs loading/storing process during this period] --- Inputs (outputs) image data. (Transfer processing of image data for 2 lines)

(Occurrence of interrupt)

Set interruption disable

IENB_REG:

d7

d0

00000000

;Interrupt disable

Read out status register

(Check end of processing.)

STAT_REG:

j=1?

Y

N

(Error)

–––––––j

End

Note 1) For ON/OFF bit of TP function in the image data processing, the ON/OFF bit of the

TP function just before coding/decoding shall be kept.

Note 2) In the image data load/store processing, be sure to set the number of transfer lines

to "2".

(The 1st line is data on the line (final line - 1) of the stripe. The 2nd line is data on

the last line of stripe.)

When a line stripe is adopted for the first stripe of the page in the image data store

processing, and read out line of the first line is outside data of stripe, the all white

data must used for replacement or the image data load function must be used in

advance to clear line memory.

;j = End of processing

Stripe

Head line

•

•

•

(Final line - 1) line

Final line

1st line

2nd line

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