Mitsubishi Electric MUX-25TV - E1 User Manual download pdf (Page 22)

LCD panel,

triangle color

formation,

and black

matrix, which dramatically

improve

contrast and overall

picture

quality.

And,

of course, there

is

an

audio /video input jack

for

the

VCR

crowd. Suggested

retail

cost of the

Pocket Watch is

$299.

In his never -ending

battle to bring

genuine theatre -quality

video

into the

home, Henry Kloss has developed the

new Novabeam 100 Projection TV.

The

unit comes

in three

screen

sizes: 5,

6.6 and

10 feet

(diagonal).

The Novabeam 100 is the

first

con-

sumer

video

product

to employ Fa-

roudja Processing. The

video

process-

ing circuit,

invented

by

Yves Faroudja,

is

said

to restore much of the original

detail lost in recording

or

broadcast of

video material

without

introducing

visual

side

effects such as ghosts or

outlines.

The Novabeam 100

also

contains an

improved

version

of the

Novatron,

Kloss Video's (640 Memorial Dr.,

Cambridge, MA 02139) patented pro-

jection

tube that uses a high -speed

(f/0.7),

telescope mirror to put the pic-

ture on the

screen.

If

you do

a double take the next time

you look at

a

normal -size television, it

may

be due to the two pictures on the

screen.

This feature

can be found on

the new digital TVs

that are available

from

several

manufacturers. With

a

digital

TV, it is

possible to press a but-

ton and

have

a

window

appear on the

screen.

This lets

you peek at

what

is

happening

on another program

source.

For

example, you can bring up

a

window

on the late night news

while

watching

a

movie from

your

VCR.

Another typical

digital

feature

allows

you to freeze a frame in the

window.

Where

there are

VCRs

and

TVs,

you

are

likely

to

find video

cameras.

And

the new cameras on the market give

a

clear

indication

that the 8 -mm tape

format

is here to stay. Six manufactur-

ers -Sony, Sanyo,

Canon,

Goldstar,

Samsung, and

Aiwa

-have

intro-

duced new 8 -mm camcorders.

Two

of the

most interesting video

products may not

show up

in

the

Analog

Video

Signal

SYSTEM

BLOCK DIAGRAM

OF

DIGITAL NON -INTERLACED TV

Digitized

TV

,-

Circuit

A/D

Converter

Digitized

Video

Signal

Synchronism

Video

Signal

Processing

R G B

Interlace

Non- interlace

Converter

G

R

G

B

D/A

Converter

Fig. 1. Analog

signal is converted into

digital form.

Fig. 2. Digital signal is converted back to analog form to

provide

full-

resolution

525

-line

scan.

marketplace

for another year

or so.

Both

are

from Toshiba

(82

Totowa

Rd.,

Wayne,

NJ 07470). The first is

a

digital VCR. The

digital

M -6900 has

1.15 megabits of RAM, which is

used

to store

images.

Conventional

VCRs

achieve special effects such as

freeze

-

frame

and slow-

motion

through the

repetition

of an

intermittent

play

/stop

movement

of the tape against the

head. This results in

bar

noise

and an

unstable screen image.

The M -6900 uses an analog- to -dig-

ital converter to select and store images

in

its

memory. The stored images are

then

reproduced on a real -time basis.

The result is a noise -free,

vivid

picture.

Besides

freezing frames from

a

video

tape,

it

can also

freeze frames from

broadcast television. Of course, once

you deactivate the

freeze mode, you'll

find that you've missed some of the

program you've been

watching.

The

other product is a television re-

ceiver that improves

the quality of the

picture

by

using

a

noninterlace

scan-

ning

technique. Conventional TVs use

2

3

262

COMPARISON OF SCANNING SYSTEM

Current interlace

2 -

262

1 Field

262.5

scanning lines

per

1/60

sec

Letter "E"

2

2

3

3'

262'

Double

-scan non -interlace

1 Field

Actually

525 scanning lines

per

1/60

sec

1 -

1' -

2 -

2

3

3' -

262

262

Letter "E"

24 /

MODERN

ELECTRONICS

/

April 1986

Say You

Saw It In Modern

Electronics

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