HDMI

Tech / 15 Sep 2026 / 6 min read

EDID Advertises Display Modes to Video Sources

A computer does not usually guess a monitor’s native resolution from the image it sees. The display exposes a small block of capability data called Extended Display Identification Data, or EDID. A video source reads that data and uses it as one input when building the list of resolutions, refresh rates, color formats, and related options offered to the operating system. EDID is descriptive rather than a guarantee that every advertised combination will work through every connection. The source, cable, adapter, dock, receiver, link bandwidth, graphics driver, and display input can impose additional limits.

Tech Displays

Tech / 15 Sep 2026 / 5 min read

Chroma Subsampling and Desktop Text Clarity

A television can show films cleanly yet make small colored text from a connected computer look soft or fringed. Resolution may be correct, scaling may be set properly, and the panel can still lose fine color detail before the image reaches the screen. One possible cause is chroma subsampling. Digital video can represent brightness detail separately from color-difference detail, then store or transmit the color portion at a lower spatial resolution. That trade is often hard to notice in photographic or moving video, but computer interfaces contain sharp colored edges that can expose it quickly.

Displays HDMI

Tech / 14 Sep 2026 / 6 min read

HDMI eARC Carries TV Audio Back to Sound Systems

A television often sits at the center of several audio sources. Built-in streaming apps generate sound inside the TV, while game consoles and media players can send both video and audio into its HDMI inputs. An external soundbar or receiver then needs a route for that audio. HDMI Audio Return Channel provides such a route. Its enhanced form, eARC, expands the audio formats and data rates that can travel from the television back to compatible audio equipment.

HDMI eARC

Tech / 13 Sep 2026 / 6 min read

HDMI Bandwidth Limits Resolution and Refresh Rate

A display can support a high resolution and a high refresh rate yet fail to offer both at the same time. The limiting factor is often the amount of video data that must cross the HDMI connection, together with the capabilities of every device in the signal path. HDMI version labels alone do not describe the complete result. The source, display, cable, intermediate equipment, selected color format, bit depth, and supported signaling modes all contribute to the maximum usable display mode.

Tech HDMI

Tech / 09 Sep 2026 / 8 min read

How HDMI ARC and eARC Send TV Sound to a Soundbar

Connecting a streaming box or game console to a TV is easy to picture: the source sends video and audio toward the TV. A soundbar creates a less obvious problem. If the TV is receiving the sound, how does that sound travel back out through an HDMI cable to the soundbar? That is the job of Audio Return Channel, usually called ARC. Its newer counterpart, Enhanced Audio Return Channel (eARC), serves the same basic purpose while supporting more demanding audio formats and improving parts of the connection process.

HDMI Audio

Tech / 08 Sep 2026 / 7 min read

Why a Monitor Can Say No Signal Even When the Cable Is Connected

A monitor can be powered on, connected by a cable, and still show No Signal. The message is easy to misread: it usually does not mean that the monitor itself has no power, and it does not prove that the cable is broken. It means the monitor is not receiving a usable video signal on the input it is currently trying to display. The quickest way to troubleshoot it is to trace that path from the source device to the selected monitor input. Each check tells you which link is still working.

Displays Monitors