高清模拟分量测试

plmqazwsx

The transition to digital has enabled great strides in the processing
of video signals, thus allowing a variety of techniques to be applied
to the video image. Despite these benefits, the final signal received
by the customer is still converted to an analog signal for display on
a picture monitor. With the proliferation of a wide variety of digital
devices – set-top boxes, Digital Versatile Disk (DVD) players and
PC cards – comes a wide range of video formats beside the standard
composite output. It is therefore necessary to understand the
requirements for measuring analog component High Definition (HD)
signals in order to test the performance of these devices.
When an image is captured by a color camera and converted from
light to an electrical signal, the signal is comprised of three components
– Red, Green and Blue (RGB). From the combination of
these three signals, a representation of the original image can be
conveyed to a color display. The various video processing systems
within the signal paths need to process the three components
identically, in order not to introduce any amplitude or channel
timing errors. Each of the three components R’G’B’ (Note the ’
indicates that the signal has been gamma corrected) has identical
bandwidth, which increases complexity within the digital domain.
Therefore to reduce the bandwidth required, we convert the R’G’B’
signals into a single luma signal Y’ made from portions of the
Red, Green and Blue as defined by the equations in Table 1. In
order to convert the signal back to its R’G’B’ components for final
display, we need two other color difference signals – B’-Y’ and
R’-Y’. These signals have a reduced bandwidth, since the detailed
picture information is carried by the full bandwidth luma channel.
A simple matrix circuit converts between R’G’B’ and Y’, B’-Y’, R’-Y’
allowing bandwidth reduction and easier implementation of digital
processing. Conversion of Y’, B’-Y’, R’-Y’ into Y’P’bP’r is often done
to allow similar dynamic ranges of the luma and color difference
signals. Typical amplitude ranges for R’G’B’ signals are 0 mV to
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han92248

看似可以一看.

jintanglei

为了攒点钱，还是得回一个，要是免费就不用浪费了，也免得说没用的废话了。 , 为了攒点钱，还是得回一个，要是免费就不用浪费了，也免得说没用的废话了。

wjvictor

顶一下，换点积分

plmqazwsx

顶顶，自己

xiangcheung

是英文的么，想下来看看

ELEDAY

非常感谢啊！！！