T
Principle of MPEG2
1. Reads and records the basic screen image from the original image.
2. Compares the read screen image with the next screen image, and records only
the information about the changed parts and hou much and which direction are
changed.
3. As needed, estimates and records the changing information (data) rather than
the changed information.
4. Play backs the basic screen image and the image made from the changed data
with inserting the image made from the estimated changing data.
With this process, a highly precise and smooth-moving image can be played
back.
T
Principle of Run Length Compression
To reduce the volume of information, the sub-video image such as superimposition is processed using a
compression method called run length coding.
When a letter is expressed using the digital signal with one pixel each (blank areas where there is no
letter are expressed as "0" and shaded areas where there is a letter are expressed as "1"), there is a
series of "0"s and "1"s which is repeated as shown below. In such cases, it is possible to code how many
"0"s follow and "1"s follow, and thereby reduce the volume of information.
Blank areas where there is no letter are expressed as "0" and shaded areas where there is a letter as "1".
Data between a - a'
0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0
Data between b - b'
0 0 0 0 0 0 1 1 1 0 0 0 1 1 1 0 0 0 0 0
Data between c - c'
0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0
Basic screen image
Time passes
Basic screen image
Changed section
Estimation based on
the changed section
Playback image
Basic screen image
Screen image made
based on estimations
Screen image made
based on changed section
SL-DV100
10
Содержание SL-DV100
Страница 4: ...4 Location of Controls 4 SL DV100 ...
Страница 11: ...7 Operation Description 11 SL DV100 ...
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Страница 13: ...8 Optical Pickup Self diagnosis and Replacement Procedure 13 SL DV100 ...
Страница 14: ...9 Self Diagnosis and Service Modes 14 SL DV100 ...
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Страница 16: ...10 Operation Checks and Component Replacement Procedures 16 SL DV100 ...
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Страница 64: ...17 Abbreviations 64 SL DV100 ...
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Страница 66: ...18 Optical Pickup Tilt Adjustments 66 SL DV100 ...
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Страница 69: ...19 Electrical Adjustment 69 SL DV100 ...
Страница 70: ...20 Replacement Parts List 70 SL DV100 ...
Страница 78: ...22 Loading Unit Parts Location 78 SL DV100 ...
Страница 79: ...23 Traverse Unit Parts Location 79 SL DV100 F990801900MT YM KH ...