Ensemble Designs BrightEye 90-F HD Up/Down Cross Converter and ARC with AES Audio and Optical Output - Manual (Page 32)

BrightEye 90-F HD Up/Down/Cross Converter And ARC With AES Audio And Optical Output
GLOSSARY
AES/EBU
The digital audio standard defined as a joint effort of the Audio Engineering
Society and the European Broadcast Union. AES/EBU or AES3 describes a serial
bitstream that carries two audio channels, thus an AES stream is a stereo pair.
The AES/EBU standard covers a wide range of sample rates and quantizations
(bit depths). In television systems, these will generally be 48 KHz and either 20
or 24 bits.
AFD
Active Format Description is a method to carry information regarding the aspect
ratio of the video content. The specification of AFD was standardized by SMPTE
in 2007 and is now beginning to appear in the marketplace. AFD can be included
in both SD and HD SDI transport systems. There is no legacy analog implemen-
tation. (See WSS).
ASI
A commonly used transport method for MPEG video streams, ASI or
Asynchronous Serial Interface, operates at the same 270 Mb/s data rate as SD
SDI. This makes it easy to carry an ASI stream through existing digital television
infrastructure. Known more formally as DVB-ASI, this transport mechanism can
be used to carry multiple program channels.
Aspect Ratio
The ratio of the vertical and horizontal measurements of an image. 4:3 is the
aspect ratio for standard definition video formats and television and 16:9 for high
definition. Converting formats of unequal ratios is done by letterboxing
(horizontal bars) or pillar boxing (vertical pillars) in order to keep the original
format's aspect ratio.
Bandwidth
Strictly speaking, this refers to the range of frequencies (i.e. the width of the
band of frequency) used by a signal, or carried by a transmission channel.
Generally, wider bandwidth will carry and reproduce a signal with greater
fidelity and accuracy.
Beta
Sony Beta SP video tape machines use an analog component format that is
similar to SMPTE, but differs in the amplitude of the color difference signals. It
may also carry setup on the luminance channel.
Bit
A binary digit, or bit, is the smallest amount of information that can be stored or
transmitted digitally by electrical, optical, magnetic, or other means. A single bit
can take on one of two states: On/Off, Low/High, Asserted/ Deasserted, etc. It is
represented numerically by the numerals 1 (one) and 0 (zero). A byte, containing
8 bits, can represent 256 different states. The binary number 11010111, for
example, has the value of 215 in our base 10 numbering system. When a value is
carried digitally, each additional bit of resolution will double the number of
different states that can be represented. Systems that operate with a greater
BrightEye-32