Canon XL 1 Посібник користувача - Сторінка 18

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5. S-video cable – aka YC cable

- calculates values/changes by different algorithm

- between composite and component

- inside camera kit

- cleaner than composite

- video only

PATHWAYS: Composite – noisy, slow, analogue, only takes video information

Component – only video, no audio capacity

6. 9 pin Remote cable – allows to stop/start/record/eject

7. XLR (audio) – 3 plugs: i. neutral

can take stereo

audio only

8. Jack cable – stereo – indicated by black rings (on top and middle)

9. Network cable – telecommunications plug

Codecs/ Compression

Types of compression:

Video codecs can use spatial compression, temporal compression, or a combination of

both.

1. Spatial compression, affects only a single frame at a time. This type of compression

makes random access to any point in the video and editing easy. Spatial compression

finds redundancy within a frame—either in areas of flat or similar colours, or areas of

a frame that look like other areas of the frame—and saves space by encoding these

similar areas by reference, rather than by a literal description of colour attributes for

each and every pixel.

2. Temporal compression, adds the ability to use other frames as a reference for the

current frame. In video, each frame tends to be similar to the frame preceding it.

Temporal compression encodes only the changes from one frame to another (with the

exception of key frames, as described below, which contain a complete representation

of the data in a frame, without reference to previous frames).

- no audio or video

- aka RSS control cable protocol

ii. left

iii. right