chapter – 3. vcr-lppt

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Video Cassette RecorderCHAPTER – 3



OBJECTIVE At the end of the topic you should able:

Know information storing methodmagnetic tape.State the recording system magnetichelical scan method. Associate relationship between the

rotating drum with field and frame video.Draw tape wrap diagram in drum.Draw and label VHS tape format.



Video Cassette Recorder

VCR Set with Remote Control



Video Cassette Recorder

VHS video Tape The inside of a VCR



Definitions VCR

Electro-mechanical device that records,stores on a videotape cassette, and playsback on a TV set recorded images andsoundCan perform the process of recording &playback.both information( Audio&Video ) can bereused during process playback.information is stored in a cassette( Tape )



QUESTION…. Is there a difference between a VCR and a VCP?

What VCP stand for…..

Answer Videocassette player, a VCR without recordingcapability.



Video tape format

Different tape formats can not be used by otherformat video tape.

a. VHS (Video Home System) Advantages - widely available and cheap

Disadvantages - Risk moldy ( berkulat ) tapesand broken.

VHS FAMILY



b. VHS - C (Compact)Size smaller than VHS Advantages - small size & lowDisadvantages - Risk moldy & broken. Needto use adapter to watch.



c. Super VHSan improvement on video and audioqualities of the VHS format.Benefits – Price tapes & camerascheap,quality video high.



Video tape format

a. 8mm, Hi8mm, and Digital 8 8mm is a consumer format which was introducedfor palm-sized camcorders.Hi-8 is an improvement on the 8mm format and

was introduced primarily for industrial customersthat could not afford expensive, broadcast-quality equipment.

FAMILY Video 8



Digital 8 video is recorded on Hi-8 tapes exceptthat the video information is digitally compressed

before being recorded to tape.Note that 8mm, Hi8mm, & Digital 8 videocassettes are the same size and have similarappearance. Advantage – Smaller sizeDisadvantage - requires an 8mm camera or deck inorder to view the videotapes.



Video tape format

a. BetaMax BetaMax was developed in 1970's by Sony BetaMax had better resolution than rivalformats, because it used more tape for eachsecond than other formats.Its "big brother", BetaCam & BetaCam SP

FAMILY BetaCam



Advantage - can fit as much video as possible intoone tape.

- better resolution

Disadvantage - Expensive



Video tape format

a. Mini-DV DV is the first high-quality videotape formatavailable to the consumer market.This format digitally compresses each videoframe to allow video information to bestored on a very narrow tape.The Mini-DV tape enclosure was designedto work in palm-sized digital camcorders.

FAMILY Digital



Storing Methods Audio and Video signal information have many storing methods

i. Vibration method

ii. Magnetic methodiii. Optical/Film methodiv. Electronic method

v. Using Laser Method



The principle of Recording and PlaybackMagnetic recording method is commonly used tostore video and audio signal is divided into THREEtypes:

i. Longitudinal Recording ( Rakaman Memanjang )ii. Transverse Recording ( Rakaman Melintang )iii. Helical Recording



Longitudinal MethodLongitudinal Recording is only suitable for lowfrequency because the wavelength with tapemovement speed that is limited.

Require a long recording tape.

Diagram of Longitudinal Recording



Transverse RecordingThis Transverse recording suitable to be used forhigh frequency but need tape that is wide( lebar ) isnot suitable to be used for domestic tape /

portable.

Diagram of Transverse Recording



Recording Technologies



Helical Recording

Helical recording was a method that is mostsuitable because does not require tape that too wide and long. Therefore, this technique is

suitable for various uses of the recording.

Diagram of Transverse Recording



Between all three systems recording only Helicalsystem that is best due to recording shapedinclined( condong ) is compared Transverse

recording system and Longitudinal recordingsystem.

chapter – 3. vcr-lppt

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