Sony DVP S9000ES Bedienungsanleitung PDF herunterladen (Seite 6)

1. High accuracy film detection with FFRF.

2. Dedicated microprocessor for motion detecting.

3. Separate 3-2 reverse conversion algorithms for video and film-

originated DVDs.

4. Full 3-2 reverse conversion.

Together, these advances enable the Sony DVP-S9000ES to

deliver more consistent, more satisfying, more seamless 525P

output with a wider variety of discs. Flicker, motion artifacts and

3-2 cadence glitches are controlled. The visibility of scanning

lines is minimized. Connect the DVP-S9000ES to a 525P-

compatible television, monitor or projector and prepare to be

amazed. You’ll approach the full glory of high definition picture

quality — from today’s standard DVDs!

Smooth 525P output depends on proper 3-2 reverse conversion.

To accomplish this, the player must accurately reconstruct the 3-

2 cadence of the original master videotape. The key to achieving

this is the sequence of First Field Repeat Flags (FFRFs) on the

DVD. Most DVDs contain a complete set of FFRFs. But

inconsistencies in videotape editing, MPEG encoding and DVD

authoring can result in irregularity in the FFRF signal. As

reviewers have already noticed, this can cause even highly

regarded players to stumble, producing visible motion artifacts.

Sony’s DVP-S9000ES overcomes the problem. The player

performs high-speed detection of missing flags, with flag look-

ahead and non-contiguous point detection. The player then

reconstructs missing flags, for smooth, uninterrupted playback of

DVD movies.

The FFRF signal is designed to be present in all film-originated

DVDs — and absent from all video-originated DVDs. Yet even

in the most extreme case, where a film-originated DVD contains

no FFRFs at all, Sony’s dedicated microprocessor with motion

detection can elicit full performance. The microprocessor can

judge the correlation between fields very accurately,

supplementing the FFRF detection system. As a result, the Sony

DVP-S9000ES can read and reproduce even this worst-case disc

in beautiful, stable 525P.

“A” and “B” fields originated on film represent a single slice of

time and have no motion between them. “A” and “B” fields

originated on video represent different slices of time and can

have significant motion. For this reason, film and video require

substantially different algorithms in Interlace-to-Progressive

conversion. Conversion of film-originated DVDs can use

relatively simple de-interlacing. Conversion of video-originated

DVDs requires a more complex motion-adaptive algorithm.

The correct application of the video algorithm requires the

precise identification of motion between pairs of video fields.

The DVP-S9000ES accomplishes this with the motion detection

microprocessor. It uses the external graphics memory of the I-to-

P conversion circuit to read pixel-level motion of each field at

high speed. Then the microprocessor instantly selects the

appropriate conversion algorithm for video, for film or for still

scenes with no motion.

High Accuracy Film Detection with FFRF

Separate Algorithms for Video and Film Originated DVDs

Fig. 3: At the top are the original

film frames, showing a car

moving down the street. Next

comes the original 3-2

pulldown. Simple frame

memory reverse conversion

results in a motion blur every

time fields from different film

frames are combined. (This

occurs for two out of every five

frames — or 40% of the time!)

Sony’s DVP-S9000ES, bottom,

uses full 3-2 reverse conversion,

to preserve the integrity of the

original film frames.

3-2 Reverse Conversion

Dedicated Microprocessor with Motion Detection

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