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VD

IC152

CCD IN

HD

Y

IC251

171 PIN

CB

IC251

174 PIN

CR

IC251

177 PIN

When the shutter button is pressed, the shutter is opened and the video
image equal to one video frame is introduced to the CCD imager and the
iris shutter is forcibly closed by the shutter drive circuit (IC201).

The CCD imager is driven by the pulses (V1 to V4, H1, H2 and RG).  In the
capture mode, the full amount of incoming information to the CCD imager
is output.

The same signal processing as in the camera-through mode is performed.

The A/D converter CCD output signal passes through the CAMERA DSP
at first and is written into the SDRAM (IC252) in the order of odd and even
signals.  When the digital signal is written into the SDRAM once, it is read
out from the SDRAM and sent to the CAMERA DSP where the digital
signal in the form of Y, CR and CB is processed.  It is then again written
into the SDRAM.  At this stage, the image data of 2,000,000 pixels is con-
structed.  While the 2,000,000 pixel data is being stored, the CAMERA
DSP uses it to create an image having fewer pixels to be displayed on the
LCD.  This smaller image data is written into the SDRAM (separately from
the 2,000,000 pixel data).  The smaller image data is once again D/A con-
verted by the CAMERA DSP to create an analog video signal for the LCD.
The 2,000,000 pixel data is compressed in JPEG format as directed by the
CAM/MEDIUM DSP.

The compressed JPEG data is written into the SDRAM (IC455).

The digital data that is written into the SDRAM (IC455) is converted from
parallel data to serial data by the memory stick interface in order to store
the digital data in the memory stick.

Because the CAM/MEDIUM Controller does not have built-in ROM, all
the camera control programs are saved in the FLASH ROM (IC454).  The
font data of OSD is also stored in the FLASH ROM.

The output image data from the memory stick is converted from serial data
to parallel data by the MEMORY STICK I/F IC (IC451) and written into
the SDRAM (IC455).  Then the output image data from the memory stick
takes two paths as directed by the CAM/MEDIUM Controller: One signal
passes through the CAM/MEDIUM Controller and enters the RS-232C
DRIVE IC (IC353).  This signal is then output from the DRIVE IC and is
sent to the DIGITAL I/O terminal of the DSC-F55/55E from which the
data is output to an external personal computer.  The other output is sent to
the CAMERA DSP where the compressed data is restored to the original
2,000,000 pixel data.

The 2,000,000 pixel data is written into the SDRAM (IC252) in the data
format of Y, CR and CB.  This data is read from the SDRAM and is sent to
the CAMERA DSP again to create the data for LCD display.  The pixel
data for LCD display is converted to VGA size and is once again written
into the SDRAM (IC252).  This data is D/A converted by the CAMERA
DSP again so that the Y, CR and CB signals are created to be displayed on
the LCD.

IC102

IC152

IC151

IC252

IC251

IC501

IC206

IC351

IC901

IC802

CD-224 BOARD

CCD OUT

LENS

IRIS
METER

SY-54 BOARD

LCD

DRIVE

TIMING

GENERATOR

LCD901

LCD

PANEL

R
G

B

Y
R-Y

B-Y

HI SO

MCXCS3

AU SOTO

AU SOTI

SERIAL I/O
HOST IF
AUDIO IF
SHUTTER CONTROL
FLASH CONTROL

MC CAM
SM DSP

CAM SO

MCXCS1

Y

R-Y/C

B-Y

MSHUT ON

STRB ON

ADDRESS

ADDRESS BUS

14

DATA

16

23

16

9

DATA BUS

16

24

16

CAMERA DSP
MEMORY CONTROL
VIDEO ENCODER
OPD,OSD,HOST IF
RES CONTROL
SG. JPEG.L-MODE

SDRAM

64Mbit

MCK12
MCK14

EVR

10

S/H. AGC.
A/D CONV.

TIMING

GENERATOR

CCD IMAGER

V1.V1B.V2.
V3A.V3B.V4
RG.VSHT

H1.H2

The MIC input works only in the “Moving Image” mode and “Voice Memo”
mode.

During the “Moving Image” mode, a still image is read from the CCD
imager in the same manner as in the capture mode.  The input voice from
the microphone is A/D converted (IC701) for about 5 seconds, its data is
converted by the audio I/F (IC501), and compressed by the CAM/MEDIUM
Controller.  The voice signal is then mixed with image data at the SDRAM
(IC455).

The input voice from the microphone is amplified by the microphone am-
plifier (IC101) and enters the LINE/SPEAKER amplifier (IC702) where
the voice data is input/output processed and enters the AUDIO AD/DA
CONV (IC701) where the voice data is A/D converted.  The digital voice
data enters the AUDIO I/F (IC501) where it is converted from serial data to
parallel data, and enters the CAM/MEDIUM Controller where it is com-
pressed to about 1/16.  The voice data is then mixed with the image at the
SDRAM (IC455).

The CCD imager signal is sampled to a quarter of the total amount of infor-
mation and is output in the same manner as in the camera-through mode.

The same signal processing as in the camera-through mode is performed
and the image data is sent to the CAMERA DSP (IC251).

The image data signal is processed to create digital data in the form of Y,
CR and CB.  The image data for LCD display is written into the SDRAM
(IC455) and undergoes the same processing as in the camera-through mode.
The image data to be saved in the memory stick is the Y, CR and CB data
which were previously written into the SDRAM (IC455), and the data are
sent to the CAMERA DSP (IC251) where it undergoes data compression.

The compressed Y, CR and CB data and the digitally processed audio sig-
nal are mixed at AUDIO I/F (IC501) and written into the SDRAM (IC455)
as controlled by the CAM/MEDIUM Controller .

The digital output data from the SDRAM (IC455) is converted from paral-
lel data to serial data and stored in the memory stick.