Video Signals Type Flashcards
Basic Elements of Video Signals (5)
Red Blue Green Horizontal Sync Vertical Sync
Bandwidth (3)
- a measure of the amount of data or signal that can pass through a system during a given time interval
- In the context of networking, bandwidth is the available or consumed data communication resources of a communication path, expressed in terms of bits per second.
- It is also called throughput or bit rate.
full-bandwidth signals
highest quality analog video signals
bandwidth-limited signals
Lower quality signals
formula for calculating video bandwidth
horizontal pixels X vertical pixels X number of components comprising the image (red, green, blue, or chrominance, luminance, etc.) X frame rate / divided by image correction factor
range of frequencies of a video signal (3)
- Lower frequencies in the Hz range include vertical sync
- Middle frequencies in the kHz range include horizontal sync
- High frequencies in the MHz range include detailed picture information
In electronics how bandwidth is expressed
bandwidth is expressed in terms of the frequency of voltage
RGBHV (2)
- high bandwidth video signal with separate conductors for the red signal, green signal, blue signal, horizontal sync, and vertical sync.
- typically used for computer and signal processors
RGBS
four component signal comprised of a red signal, green signal, blue signal, and a composite sync signal
Bandwidth Limiting
the result of encoding a higher quality signal into a lower quality form, such as RGB converted into S-Video.
Component Video (3)
- Color video in which the brightness (luminance) and color hue and saturation (chrominance) are handled independently.
- The red, green, and blue signals—or more commonly, the Y, R-Y, and B-Y signals—are carried by three separate wires.
- Because these signals are independent, processing such as chroma keying is facilitated.
S-Video (2)
- S-Video, also known as Separate Video or Y/C, is a two-channel, standard definition analog video signal.
- Y (luminance) and C (chrominance) are transmitted on separate conductors.
Composite Video Signal
Composite video signal is the electrical signal that represents complete color picture information and all synchronization signals, including blanking and the deflection synchronization signals to which the color synchronization signal is added in the appropriate time relationship.
IP Video Streaming Bandwidth
H.264 is one of the most commonly used digital formats for recording, compression, and distribution of video content supporting resolutions up to 4K
4K (2)
- 4K video cameras, media players, and displays enable the recording and display of video at 3840x2160-pixel resolution
- This is also often called Ultra HD.
Uncompressed
- 36.7 Gb/s bandwidth per stream
- 4K at 60fps Resolution
- 40/56 Gb Network Required
- Live Events
SDVoE
- 9 Gb/s bandwidth per stream
- 4K at 60fps Resolution
- 10 Gb Network Required
- Video Walls
MJPEG2000
- 130 Mb/s bandwidth per stream
- 2K at 24fps Resolutions
- 1 Gb Network Required
- Signage
H.264
- 4.62 Mb/s Bandwidth Per Stream
- 1080P at 30fps Resolutions
- 10/100 Mb Network Required
- Conferencing
Basic Elements of Video Streaming (5)
- Designed for use over IP Networks
- Uses color and motion averaging algorithms to reduce bandwidth requirements called compression
- Compromises some quality (color, frame rate, clarity) based on use case
- Bandwidth requirements vary greatly based on use requirements
- Can use different compression methods on the same network
HDMI
High-Definition Multimedia Interface
High Definition Multimedia Interface
a point-to-point connection between video devices, and it is the standard for high quality all-digital video and audio. HDMI signals include audio, control, and digital asset rights management information. It is a “plug-and-play” standard that is fully compatible with DVI.
TMDS
Transition-minimized differential signaling
Transition-minimized differential signaling
a technology for transmitting high-speed serial data in HDMI
