Elenco Electronics MO-1251 Uživatelský manuál stáhnout pdf (Strana 8)

100

VIDEO

NEWS

Personal

video.

Sony's compact Video

Walkman,

which combines

an 8mm VCR

and a TV

set with a 3 -inch LCD

screen in

a book

-size

package, seems

have

opened a new product

category

called "personal video."

Before the year

is over,

there probably will

be at

least

a half -

dozen competitors

on the market. Most

of them

will

sacrifice some compactness

for versatility,

though,

using

full

-size VHS

decks

instead

of 8mm.

Casio already has a VHS

combination with

a 3.3-

inch

screen,

and

expected

introduce

new

models

with 4- and

5 -inch

pictures.

Matsushita

has

model

with a compact

Super VHS -C

transport

and will add one with full -size

VHS,

while

Sharp has demonstrated

a 4 -inch

combo

and

Hitachi

has

shown a 5- incher.

Canon will

join Sony in

the 8mm field,

but

its

model is

reported

to be even

smaller and lighter

than the

original Sony Video

Walkman.

Private

Eye.

Consumer -electronics

manufacturers

are

exploring possible personal -

video uses

Private

Eye, a

tiny 2 -ounce display

device developed by Reflection Technology

Inc.,

Cambridge, MA,

that is expected

to be used within

a year for

computer

and calculator displays.

Private

Eye can

be clipped to eyeglasses,

headphone,

or a helmet

so that one eye

looking

through a viewing window

that is less

than

inch

square. The

eye sees the equivalent

of a

12-

inch

display hanging in mid

-air about 2 feet

away.

So far, it has

been shown only

as a

monochrome

display, but with high

contrast and with

resolution

720

280 pixels. Its

developers say

that it is

potentially very inexpensive and

that a

color

-video

version could

be developed as "a

realistic

engineering activity, not

a science

activity." One major

Japanese

TV manufacturer

reportedly has

taken a

license

on the system,

which

could become the visual equivalent of

earphones.

HDTV

seen

taking over.

HDTV

will

grow

faster

than either color TV

VCR's,

according to

a report

by Robert R. Nathan Associates for

the

EIA. The report forecast

that

HDTV receivers

DAVID

LACHENBRUCH,

CONTRIBUTING

EDITOR

would

25% of American

households

by the

end of the century,

and that 10%

of American

homes

would have

HDTV

sets

four years

after

high -

definition broadcasting

begins. Among

other

findings

and assumptions in

the report: Initially,

HDTV

will find its

place in

sets with

screens 30

inches

and larger,

eventually

dipping down

to the

-inch

size. Transmission

standards

should be

set

time for

the

first

significant

sales of HDTV

sets to start in 1993. Large-

screen HDTV

sets will

first

be sold at

an average retail price

of about

$2,500. Most large-

screen HDTV

sets will be

made in

the United States.

HDTV sets will

completely replace

NTSC

sets

the 30- inch -and-

larger size

group

the market

within 6 years

adoption. Current NTSC

sets won't

rendered

obsolete by HDTV

because the new

broadcasts

and cable -casts

will be compatible

with existing

standards.

Still video.

Although

video

has

taken over

from film

consumer -movie

making,

may

have

a much

tougher road

ahead

before it

can

dispossess

film in

still-

picture

taking. At least

eight manufacturers

have

now introduced

still-

video

camera

systems

Japan and/or

the

U.S.;

all of those

systems

utilize

the standard

2 -inch

magnetic

"video

floppy"

that can

store 50

single -

field

pictures

full

-frame

images.

Still video

has

already

found

a place in

newspaper

photography

because

of its immediacy

and its

ability

be transmitted

over regular

telephone

wires.

Its

advantages in

the home include

that

same capability

phone

transport,

along with

the

ability

to view pictures

over

any TV

set.

However,

its

current

disadvantages

consumer

product

are

topped by its high

cost, its

low

definition

as compared

with film

photography,

and

the high

cost of making prints.

In some

ways, the history

of consumer video

and

film

photography

have

followed

opposing paths:

In film,

still photography

came first, followed

much later

by practical

moving pictures.

In video,

however, just

the opposite is

true; motion was

easy

while economical

still

pictures

pose

real

problem

to manufacturers.

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