What is HDMI?
HDMI (High Definition Multimedia Interface) is a specification that combines video and audio into a single digital interface for use with digital versatile disc (DVD) players, digital television (DTV) players, set-top boxes, and other audio visual devices. The basis for HDMI is High Bandwidth Digital Content Protection (HDCP) and the core technology of Digital Visual Interface (DVI). HDCP is an Intel specification used to protect digital content transmitted and received by DVI-compliant displays.
HDMI supports standard, enhanced, or high-definition video plus standard to multi-channel surround-sound audio. HDMI benefits include uncompressed digital video, a bandwidth of up to 5 gigabytes per second, one connector instead of several cables and connectors, and communication between the video source and the DTV.
How to use the ARC?
ARC function: If you need to use ARC, your HDTV must support this function, when you open the ARC function. The coaxial of the receiver will output the HDTV current display content audio signal. Otherwise will output the HDMI source (DVD, set-top-box, etc.) audio signal.
How to use the IR?
IR BLASTER (TX)
To control the source: Plug IR Blaster into IR TX port of transmitter unit (TX); place blaster in front of the IR eye of the source.
To control the display: Plug IR Blaster into IR TX port of receiver unit (RX); place blaster in front of the IR eye of the display.
IR RECEIVER (RX)
To control the source: Plug IR Receiver into IR RX port of receiver unit (RX); place receiver at or near display.
To control the display: Plug IR Receiver into IR RX port of transmitter unit (TX); place receiver in position where it is able to receive remote signals.
What is the difference between DVI and HDMI?
HDMI is DVI with the addition of:
- Audio (up to 8-channels uncompressed)
- Smaller Connector
- Support for YUV Color Space
- CEC (Consumer Electronics Control)
- CEA-861B Info Frames
Why do cables have an effect on signal quality?
The video signal is very sensitive, as it has to carry information spread over a wide spectrum of frequencies, from almost 0 Hertz (DC) to many MHz (millions of Hertz – oscillations - per second). When high frequencies are involved, proper cable termination (loading) is needed in order to equally transfer all frequencies and avoid an effect called “standing waves”, which is a result of signal reflections in the cable creating signal loss, “ghost” images and instability. The electrical energy stored in the video signal is perfectly transferred from the source to the acceptor if the cable is fully matched at both ends. Low quality cables are not suitable for good signal handling and usually have excessive built-in capacitance, which degrades the signal. When an inappropriate cable is used, quality of the signal deteriorates, details of the picture are lost, color fidelity is reduced and noise level, apparent as snow, destroys the picture. In addition, some low quality cables are not properly shielded, and do not isolate the video signal from external interference.
What is Seamless Switching?
With a traditional HDMI matrix or switcher, switching between multiple HDMI inputs can take five or even up to ten seconds, which is always considered as a noticeable delay, to consumer user experience as well as to professional setup. The delay is majorly caused by the HDCP authentication procedure between the source device and the display, as it’s required to be done every time the connection is established, for example when you change to another input on an HDMI switcher. CYP HDMI Seamless Switching matrix and switcher, developed with the latest technologies, are able to solve this issue by sustaining the connection between multiple source devices and the display, it takes almost no time (only few milliseconds depends on the capability of the connected display) to show video from the next selected input.
When is video signal distribution needed?
Signal distribution is needed when one or more signals are to be received at several acceptors. Some examples - in a duplication studio where many copies are made from one master, in shops and at points of sale for advertising and promotion, in railway stations and airports for time and route announcement and in many other applications. In the CCTV and security field several guards may need to control the same scene on several monitors, and in educational applications, pupils in several classrooms may watch one video signal. The main object is to achieve the highest signal quality and equal outputs at each acceptor. In order to achieve high quality distributed video signals a distribution amplifier is needed. The video (and, if necessary, the audio) source is connected to the input(s) of the video distributor, and the outputs of the distributor are connected to the video acceptors. High quality cable and connectors should be used throughout. This setup is good for short distances between source, amplifier and acceptors of up to 15meters.
How to remote control a switcher?
A switcher may be remote controlled with wires or by a wireless remote controller. The wires may be either connected in parallel to the existing control switches (if allowed by the design) or using the RS-232 or RS-422 control option provided by the machine. Wireless remote control usually employs an IR (infrared) transmitting-receiving system, similar to the systems available for home remote control (TV, VCR etc.)
What are the sync related problems in video?
Sync related problems might be divided into two kinds: Problems with the sync information carried with the video signal. Problems of sync signal compatibility. As sync information is vital for video image stability, deterioration or loss of the sync signals effects image stability. Both Horizontal and Vertical sync signals are crucial for image stability and proper image centering on the screen. When the sync signals are effected, during transmission or recording, they may be recovered using a sync restoring device or a TBC (Time Base Corrector). The problem of sync compatibility exists because there are so many standards for transferring sync information with the video signal: sync signals may come in analog form, as a composite sync signal, and they may come in digital form - either composite or separate - Horizontal or Vertical, positive direction or negative. The sync signals may also be part of the luminance signals (as in Composite Video or Y/C) or ride on a video component signal - such as the “Green” signal. To solve this compatibility problem, special sync format converters are needed.
FAQ For 100M HDMI EXTENDER HDV-E100
Q : Please ask your engineers to confirm if this version uses IP UPnP protocol or IP addresses and IP broadcast protocol.
A : IP addresses and IP broadcast protocol
Q : Is there a web-interface?
A : Yes
Q : Which type of connection is established between the units?
A : RJ45 cable
Q : The extender using UTP cable termination follows the standard of IEEE-568B
A : Yes
Q : Is the operating IP-range & subnet-mask fix or can it be changed by user according to existing network?
A : Yes, can be modified by Web page
Q : Which kind of data-transfer is it, e.g. Multicast-standard?
A : Multicast without IGMP
Q : Does the transmitter create an own IP-range being DHCP capable inside an existing network?
A : Firmware optional.
Q : Can it only be in an own network (so only the displays, players and TX&RX) or can be connected to an existing network (classic clients, Server, ISP, Router-setup) using internet-connection at the same time?
A : Own network (so only the displays, players and TX&RX)
