Broadcast Quality is an term stemming from quad videotape to denote the quality achieved by
professional video cameraA professional video camera is a high-end device for creating electronic moving images...
s and time base correctors (TBC) used for broadcast television, usually in standard definition. As the standards for
commercial televisionCommercial Television was the third free-to-air broadcast television station in Hong Kong. It first went on air in 1975, and ceased transmissions in 1978.-History:...
broadcasts have changed from
analog televisionAnalog television is the analog transmission that involves the broadcasting of encoded analog audio and analog video signal: one in which the message conveyed by the broadcast signal is a function of deliberate variations in the amplitude and/or frequency of the signal...
using
analog videoAnalog video is a video signal transferred by an analog signal. An analog color video signal contains luminance, brightness and chrominance of an analog television image...
to
digital televisionDigital television is the transmission of audio and video by digital signals, in contrast to the analog signals used by analog TV...
using
digital videoDigital video is a type of digital recording system that works by using a digital rather than an analog video signal.The terms camera, video camera, and camcorder are used interchangeably in this article.- History :...
, the term has become more nebulous
.
Manufacturers have used it to describe both
professionalA professional is a person who is paid to undertake a specialised set of tasks and to complete them for a fee. The traditional professions were doctors, lawyers, clergymen, and commissioned military officers. Today, the term is applied to estate agents, surveyors , environmental scientists,...
and
prosumerProsumer is a portmanteau formed by contracting either the word professional or less often, producer with the word consumer. For example, a prosumer grade digital camera is a "cross" between consumer grade and professional grade...
or "Semi-Professional" devices. A camera with the minimum requirements typically being the inclusion of three
CCDsA charge-coupled device is a device for the movement of electrical charge, usually from within the device to an area where the charge can be manipulated, for example conversion into a digital value. This is achieved by "shifting" the signals between stages within the device one at a time...
and relatively low-compression
Analog recordingAnalog recording is a technique used for the recording of analog signals which among many possibilities include audio frequency, analog audio and analog video information for later playback.Analog recording methods store signals as a continual wave in or on the media...
or
digitalA digital system is a data technology that uses discrete values. By contrast, non-digital systems use a continuous range of values to represent information...
recording capability with little or no
chroma subsamplingChroma subsampling is the practice of encoding images by implementing less resolution for chroma information than for luma information, taking advantage of the human visual system's lower acuity for color differences than for luminance....
that can use
genlockGenlock is a common technique where the video output of one source, or a specific reference signal from a signal generator, is used to synchronize other television picture sources together. The aim in video and digital audio applications is to ensure the coincidence of signals in time at a...
. The advantages of three CCDs include better color definition in shadows, better overall low-light sensitivity, and reduced
noiseIn common use, the word noise means any unwanted sound. In both analog and digital electronics, noise is random unwanted perturbation to a wanted signal; it is called noise as a generalisation of the acoustic noise heard when listening to a weak radio transmission with significant electrical noise...
when compared to single-CCD systems. With continuing improvements in
image sensorAn image sensor is a device that converts an optical image into an electronic signal. It is used mostly in digital cameras and other imaging devices...
s,
resolutionOptical resolution describes the ability of an imaging system to resolve detail in the object that is being imaged.An imaging system may have many individual components including a lens and recording and display components...
, recording media, and
codecA codec is a device or computer program capable of encoding or decoding a digital data stream or signal. The word codec is a portmanteau of "compressor-decompressor" or, more commonly, "coder-decoder"...
s, by 2006 the term no longer carried much weight in the marketplace.
The term is also used in its literal sense in
broadcastingBroadcasting is the distribution of audio and video content to a dispersed audience via any audio visual medium. Receiving parties may include the general public or a relatively large subset of thereof...
jargon in judging the fitness of audio or video for broadcast.