Panasonic DMR-E20 Maintenance, Reference, Pan&Scan/Letterbox, Playback control PBC, Play list

Pan&Scan/Letterbox

In general, DVD-Video are produced with the intention that they be viewed on a widescreen television with an aspect ratio of 16:9. This means you can view most material with the intended aspect ratio on a widescreen television.

Material with this ratio will not fit onto a standard television with an aspect ratio of 4:3. Two styles of picture, “Pan&Scan” and “Letterbox”, deal with this problem.

Pan&Scan: The sides are cut off so the picture fills the screen.

Letterbox: Black bands appear at the top and bottom of the pic- ture so the picture itself appears in an aspect ratio of 16:9.

Playback control (PBC)

This is a method of playing video CDs. You can select parts to play by using menus recorded on the disc.

Play list

This is a collection of scenes. It enables you to play these scenes in succession or to select specific ones to play.

Program (PRG)

The section between the point where recording is started and the point where it is stopped.

Sampling frequency

This is the number of samples of sound taken per second during conversion to a digital signal. A high sampling frequency results in a sound close to the original when played back.

S video output

The color (C) and luminance (Y) signals are separated before being sent to the television, making for greater picture clarity.

Title/Chapter (DVD-Video)

DVD-Video are divided up into large sections, titles, and smaller sections, chapters. The numbers allocated to these sections are called title numbers and chapter numbers.

Example

Title 1 Title 2

Chapter 1 Chapter 2 Chapter 3 Chapter 1 Chapter 2

Track (Video CD/CD)

This is the smallest division on CD and Video CD, and usually equates to a single song.

Example

Track 1 Track 2 Track 3 Track 4 Track 5

Maintenance

The precision parts in this unit are readily affected by the environment, especially temperature, humidity, and dust. Observe the following points to ensure continued listening and viewing pleasure.

To clean this unit, wipe with a soft, dry cloth.	Dust and dirt may adhere to the unit’s lenses over time, possibly
³Never use alcohol, paint thinner or benzine to clean this unit.	making it impossible to record or play discs.
³Before using chemically treated cloth, read the instructions that	Use the recommended DVD-RAM/PD lens cleaner
came with the cloth carefully.	(LF-K123LCA1)every 1 to 4 months, depending on frequency of
	use and the operating environment.
	Read the lens cleaner’s instructions carefully before use.

Reference

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RQT6035