AJA KONA LHe Plus Instruction Manual download pdf (Page 62)

back to the AJA Control Panel application and select a KONA LHe Plus as the "targeted"

product. Launch the AJA TV application. AJA TV would now use the LHe Plus for its

output. If you switch back to Final Cut Pro 7, you would note that it is still uses the KONA

3G for its input/output. Note that some applications, like AJA TV, have a provision for

playing in the background, so playback on one product could even continue when

switching the targeted device for use with another application. You can even feed the

output from one AJA product to another AJA product on the sam e system in such cases.

AJA TV Preferences, Continue Playback when AJA TV is in background

AJA TV optionally supports playback in the background; checkbox “Continue Playback when

AJA TV is in background.

Notes on using

multiple AJA

Products:

Performance of multi-product use depends on a variety of factors: CPU usage, RAM, disk IOPS/

bandwidth for streams of video, etc. and therefore performance may vary. Also be aware that

multiple input/output streams are only supported by software that is explicitly designed for a

multi-product environment.

Using 8-bit Versus 10-bit Video

While both 8- and 10-bit uncompressed video are capable of providing excellent quality

broadcast video, 10-bit represents a significantly higher quality and is preferable in many

situations.

Because 10-bit video has four times the numerical precision when compared to 8-bit, it has a

signal-to-noise ratio 12 db higher than 8-bit video.

Visually, in 8-bit video compared to 10-bit video, you will notice a substantial difference. In 8-

bit video there will be “contour lines” or “striations” visible, particularly noticeable in scenes

having soft gradients like a ramp or sunset. For example, if a sky region is mostly the same

color but varies by only a few digital numbers from one side of the picture to another, you

may see contour lines where the signal passes from one digital value to the next higher value.

Since each numerical value in a 10-bit system is only one fourth as large as an 8-bit system's,

these contours become invisible and the sky varies smoothly.

10-bit video is often used when the source and output video (or “master”) is also 10-bit. Even

if the input and/or output video is 8-bit, a 10-bit “project” will still m aintain a higher quality

when there is a significant amount of effects rendering involved.

Industry standard professional mastering formats—Sony Digital Betacam for Standard

Definition and Panasonic D5 for High Definition—are both true 10-bit formats.

1 2 ... 57 58 59 60 61 62 63 64 65 66 67 ... 73 74

No comments

AJA KONA LHe Plus Instruction Manual Page 62