Bedienungsanleitung Yamaha dvd s2300 (Seite 37 von 37) (Englisch)

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APPENDIX

Bitstream

In this manual, “bitstream” refers to the digital form of

multiple channel audio data (e.g., 5.1 channel audio)

before it is decoded into its various channels.

Decoder

A device or program that translates (decodes) encoded

data on DVDs into an appropriate format.

Frames

Moving pictures are composed of a sequence of still

images called frames. About 30 frames are shown each

second (30fps). Each frame is composed of two interlaced

ﬁelds. A television displays these ﬁelds in rapid succes-

sion to create frames.

Frame stills and ﬁeld stills

frame still

is an image composed of two alternating

ﬁelds. Edges may be slightly blurry, but the overall image

quality is high.

ﬁeld still

is an image composed from only one of the

two ﬁelds. The picture is not blurry, but contains only half

of the visual information of a frame still.

Group

A DVD audio disc is divided into large sections called

“groups” and smaller sections called “tracks.” The num-

bers allocated to these sections are called “group num-

bers” and “track numbers.”

Interlaced and progressive output

NTSC, the video signal standard, uses 525 interlaced (i)

scan lines. Progressive scanning uses twice that number of

scan lines and is called 525p. The 525i video signals out-

put from the unit’s COMPONENT VIDEO OUT jacks (Y,

, P

) allow you to enjoy higher quality pictures than if

the signals were output from the video output jack or S

VIDEO OUT jack. The COMPONENT VIDEO OUT

jacks are also able to handle 525p (progressive) video sig-

nals, which are of even greater resolution.

PCM

Pulse Code Modulation (PCM) converts analog waves into

digital signals. It is commonly used in the creation of

music CDs. DVDs allow greater volume, and hence use

linear PCM, which has a higher sampling rate. Com-

pressed PCM signals are called packed PCM (PPCM).

Pan&Scan/Letterbox

In general, DVD-Video discs are produced with the inten-

tion of being viewed on a widescreen television with an

aspect ratio of 16:9. This means you can view most mate-

rial at the intended aspect ratio on a widescreen television.

Material with this ratio will not ﬁt onto a standard televi-

sion with an aspect ratio of 4:3. Two picture styles,

“Pan&Scan” and “Letterbox,” resolve this issue.

Pan&Scan: The sides of the image are trimmed so the

picture can ﬁll the screen.

Letterbox: Black bands appear across the top and bot-

tom of the image. The picture appears at an

aspect ratio of 16:9.

Playback control (PBC)

The term “playback control” on a Video CD or its packag-

ing indicates that certain scenes or information may

viewed interactively or navigated by menu. This unit can

play Video CDs that feature playback control.

Sampling frequency and quantized bits

When digitizing an analog audio signal, the number of

times the signal is sampled per second constitutes the sam-

pling frequency. The degree of ﬁneness with which a

sound level is converted into a numeric value is deter-

mined by the number of quantized bits.

Title/Chapter

DVD-Video discs are divided into large sections (titles),

and smaller sections (chapters). The numbers allocated to

these sections are referred to as title numbers and chapter

numbers.

Track

A track is the smallest division on DVD-Audio, CD, and

Video CD discs. It usually equates to a single song.

GLOSSARY

DVD-A

DVD-V

VCD CDSACD DVD-A

DVD-S2300_G.book Page 35 Friday, October 18, 2002 2:42 PM

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