If you're connecting out of the device to the TV's optical in, then from the TV's optical out to the receiver, you're wasting an optical cable. Just connect directly to the receiver. There shouldn't be any sound quality difference either way since it's a digital connection, but it's much cleaner with only one cable.
The optical cable would be the best choice.
HDMI and optical are both physical carriers for data. Whatever signal is put onto the cable or fiber will come out the other end and will be identical quality. The quality of the signal is entirely dependent on the signal source and not the interface cable. The better interface is the one that fits better into the system in question. For an audio only set up, optical fiber will probably be the right choice. For video based systems with soundtracks for video content, HDMI will be the more convenient solution. The important point to note is that neither method will degrade the audio quality nor will either of them enhance quality. The cable or fiber is effectively completely transparent and has no effect on the resulting sound. Please note: HD audio formats like Dolby True HD and DTS Master Audio cannot be transferred by optical cable.
The question probably refers to a copper digital interface against an optical interface. The copper interface carries electrical signals while the optical interface uses light pulses to carry the signal. The quality of either of them is dependent entirely on the quality of data that is fed to the interface. A copper cable or an optical fiber carrying the same data will deliver identical signals at the far end. At high data rates fiber can generally carry a signal a longer distance than copper but at audio rates, this is not the case. There are a few audiophiles who claim that copper cables can cause "jitter". This is a minor instability in signal timing and in extreme cases it can result in lost data. Their claim is that jitter causes audible distortion although there is little evidence to support the claim. Almost all equipment use techniques to eliminate the effects of jitter. It is also the case that optical fiber links suffer from the same jitter. Although this answer is not intended to fuel the debate about jitter distortion, one should be careful about how much weight is given to the "jitter causes distortion" argument. Therefore, when selecting a transmission method, the most convenient link should be selected. If both source and receiver have optical links, use optical by all means. If both have a copper digital link, that will operate just as well.
S/PDIF is the domestic digital audio standard, developed by Sony and Philips. It is normally carried on a copper cable using RCA (phono) connectors or with an optical fiber using TOSLink connections. Both interfaces carry the same data and can be considered equivalent to each other. One does not offer better quality than the other.
mp3 - it's more common, smaller, and of comparable quality
The optical cable would be the best choice.
The difference between optical and non optical is the way the drive in the DVD reads the disk. Optical is a better and more higher quality reader. So the picture is much better.
The reason an optical zoom is better to have than a digital zoom boils down to quality. When one uses an optical zoom the subject is brought in closer without losing quality. When a digital zoom is used, the camera crops and digitally enlarges the picture, sacrificing quality.
They are about equal in quality. Far better than the analog hookup.
Generally an optical mouse provides much better function than an older ball design mouse. The lack of an internal ball to move the mouse reduces the need for cleaning and build up do to the ball itself wearing down.
Optical Zoom is the true zoom, Digital is basically the zoom in of what the highest optical zoom is. Therefore Optical Zoom is the better zoom, and gives a much clearer picture.
HDMI and optical are both physical carriers for data. Whatever signal is put onto the cable or fiber will come out the other end and will be identical quality. The quality of the signal is entirely dependent on the signal source and not the interface cable. The better interface is the one that fits better into the system in question. For an audio only set up, optical fiber will probably be the right choice. For video based systems with soundtracks for video content, HDMI will be the more convenient solution. The important point to note is that neither method will degrade the audio quality nor will either of them enhance quality. The cable or fiber is effectively completely transparent and has no effect on the resulting sound. Please note: HD audio formats like Dolby True HD and DTS Master Audio cannot be transferred by optical cable.
Digital image is depending on the camera resolotion, where optical image depends on the quality of the film. Normally an optical image will be better then a digital image, unless you are using high end digital camera. I hope this helps, Icko www.rtgallery.com
They don't. All earth bound telescopes, optical or not, must deal with a number of issues. But what do you mean by "better"? A radio telescope is better suited to pick up radio waves than an optical telescope, but an optical telescope is better for visible light. They each serve their purpose better than the other.
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Optical zoom is way better than digital zoom as digital only expands the picture. Optical zoom actually zooms in.
This is TRUE but better quality sound comes from Optical or digital hookups.