Cheap or expensive, the cable is irrelevant when it comes to transmitting Dolby or DTS. If the cable is faulty or if there is some cataclysm causing data to be lost between the player and the receiver, the decoders are designed to mute instead of blasting out compromised data. There is no such thing as an audio version of "sparkles. So if you're getting audio dropouts, it's possible it's the HDMI cable. But if you're not getting video issues as well, the problem is likely elsewhere.
If the audio isn't muting, then as long as you're outputting an audio codec, you're getting exactly what's on the disc. This data is packetized, just like the rest of the audio and video signal.
As such, it is error-corrected. However, jitter is far more likely than with an optical or coax connection. In discussions with several audio equipment manufacturers since the original publication of this article, I've been told by all of them that the DAC in the receiver is going to have a far greater effect on the sound than the jitter in the transmission. Before you leap on that, keep in mind that the DAC has a smaller effect on the sound than the amp, the speakers, and definitely less than the room itself.
Oh, and in case that wasn't clear, the jitter is inherent in the HDMI transmission itself. The cable isn't going to have any effect. Likely transmission The big "if" that I've been repeating is "if the signal gets there.
Over longer runs, the answer is less clear-cut. The variables of the transmitter and receiver combo in the source and display, plus any repeaters you have in the mix like a receiver , mean that not every long HDMI cable can handle all the data. By long, I mean 50 feet or more. If you need to run long HDMI cables, it's a safe bet you're going to run it through a wall.
If so, it is vital you test the cable with all your equipment before you install it. Plus, as tempting as it is to get the cheapest cable that will work in this case, just because a cable works with all your current gear, doesn't necessarily mean it will work with your future gear. That's it. Standard-speed cables are rated to carry up to i. Many standard-speed cables can probably handle p, they're just not rated for it.
Check out my article on how 3D content works for more info on that. Honestly, though, if you're buying the right kind of cables i. When cable manufacturers claim their cables are "Made for Hz" they are lying to you. The conversion to or Hz is done inside the TV. There is no such thing as a Hz or Hz signal. This is the highest-bandwidth, non-computer source you can have, and even it is only 60 Hz check out i and p are the same resolution and What is refresh rate?
More expensive cables can be more rugged, with thicker casings, a beefy connector, and higher potential durability. If and how much more this is worth is up to you.
Personally I find the bulky plugs of many "high-end" HDMI cables to be a nuisance, either falling out, or pulling on the connector in such a way that could potentially pose problems in the long run.
Better made cables may even last longer. Over these short distances, even the cheapest HDMI cables are going to work. And if they work, as you've read, it means you're getting perfect image and sound. Even over long runs, most cheap cables can do the job just fine. In the year and a half since we first published this article, the most common misunderstanding comes from those used to an analog cable mentality.
They understand that over any cable, there is a high likelihood of signal degradation. As in, the signal received by the television isn't as strong or exactly the same as what leaves the source. However, unlike analog cables, there is no linear correlation between signal degradation and picture degradation.
The picture will be perfect up to the point where there's not enough signal to create the image. At that point, you'll have nothing. Don't automatically expect to achieve these results! Your system and environment may be very different. Good quality cable is built to deal with interference.
However, in 'noisier' signal environments for example, within a highly populated rack, or adjacent to electrical cables or other electrical devices, HDMI cable can still be susceptible to interference and additional shielding might benefit. Additionally, the longer the cable run, the more susceptible the signal is to interference.
It's worth noting that as HDMI is a digital signal, one of the most common results of interference is intermittent signal drop-out. The more you can minimise that the more successful the signal is. This means better sound and picture. With over 50 years experience in supply and system design for many of the UK's largest, high profile audio projects, our AV experts provide a unique level of technical support and customer service.
If you have a question for our AV experts, please contact us now. Subscribe to our YouTube channel now at howtoav. Login Log in to your Account. Toggle navigation. Which HDMI cable is best? What is the difference between HDMI standards of cable?
How long is the cable that you need? Manufacturers sometimes refer to CEC using their own branded term e. High-Bandwidth Digital Content Protection HDCP — this authentication protocol allows a sending and receiving device to verify each other's credentials stored on each device's Extended Display Identification Data EDID chip and, if every checks out, create a shared key that is used to encode and decode the data passing between them.
This process, known as a handshake, happens almost instantaneously at the beginning of a session and ensures that an unauthorized device cannot intercept the data as it travels between two devices. Chroma Subsampling — Chroma subsampling is a form of video data compression. It reduces the amount of color data in a video signal in such a way that there is little or no visible impact on image quality. Each pixel in a video image includes information on brightness luma and color chroma.
Since human eyes are more sensitive to differences in brightness than color, chroma subsampling reduces the amount of data transmitted by allowing pixels to share color data with adjacent pixels.
Chroma Subsampling is represented as three digits. The first number is the number of pixels in each row of the sample. The second number indicates the number of pixels in the TOP row that have color information.
Color Spaces and Deep Color — A color space is a defined range of colors that can be represented in an image. Two important characteristics of a color space are Color Depth and Gamut. Color Depth is the number of bits used to represent the color of a single pixel and determines the amount of shading or gradation. Gamut refers to the number of colors available. HDMI 1. It's worth keeping in mind that the human eye can only distinguish around 10 million different color, so bit color is adequate for most situations.
In other words, video and audio to the TV and audio back to the sound bar the "return" part. It combines the features of an Ethernet cable into the HDMI cable, thereby avoiding the need for a separate Ethernet cable. Xbox and Roku are two examples of devices that can take advantage of HEC to connect to the Internet. Dynamic HDR simply means the dynamic range can be set on a per-scene basis or frame-by-frame in the case of high-end TVs.
The higher the resolution, color depth and frame rate, the more bits need to be transmitted until the maximum bandwidth is reached. Then, the only way to transmit more bits is to add more lanes to the cable or compress the signal. HDMI 2. Active vs. Passive cables have a limited range more on this later. Active cables on the other hand include a signal booster that enables video and audio to be transmitted over longer distances. Active cables sometimes require a power supply.
Consensus seems to be about 50 feet for p and feet for 4K video, but distances of over feet are achievable. A good practical approach is to try a passive cable and, if you have problems with signal strength, add an in-line signal booster at the receiver end.
Active Cables — Length is more definitive in the case of an active cable because signal transmission is designed and tested over the advertised distance. When transmission distance requirements exceed the limits of passive and active cables, it's time to consider the various forms of signal extension.
Greater distances are possible at lower frame rates. HDMI over Fiber — The connectors on fiber HDMI convert conventional electrical inputs to pulses of light that are transmitted at high speed through optical fiber, then converted back to electricity on the receiving end.
Wireless is generally slower than hardwire so make sure the video resolution and frequency is sufficient for your needs. Yes, but not directly. The adapter may require an external power source. It is the PD handshake that establishes an Alt Mode connection. As a general rule, video and audio can be converted from one protocol to another equal or lesser protocol as the table below shows. Protocol conversion requires an adapter.
Switches and splitters are often confused and for good reason. They perform similar functions. A switch takes multiple inputs and lets you choose which one to display on your TV or computer monitor. A splitter does exactly the opposite. It takes a single video signal and replicates it to multiple displays.
Each display will show the same image. Splitters are often classified according to their inputs and outputs. For example, a 2-port splitter might be referred to as "1x2" because it has one input and two outputs.
When choosing a splitter, make sure the output is at the resolution and frequency you want. For example, a boardroom presentation might include Powerpoint slides and video from a streaming service like YouTube or Vimeo. A matrix switch has multiple inputs AND outputs. For example, a 9x2 matrix switch has 9 inputs and 2 outputs. Another variation on the many-to-one theme is the Multiviewer , which consolidates a number of video inputs on a single monitor.
Multiviewers are found in broadcast control rooms and video surveillance systems. No, an HDMI splitter takes one video signal and replicates it to multiple displays so each display shows the same image. This is known as "mirroring". Here are your options for extending your desktop:.
A power surge is typically a brief increase in voltage due to, for example, an overloaded circuit, power outage or lightning strike.
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