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Comprehensive Audio Video Guide

*this is mostly here as storage due to the fact that PVRs.net is being taken down* *it is raw, unformatted info to be added to a further compilation soon* *all below content authored by myself*


Addition to Video > TV Resolutions

480p - While not considered high-definition, 480p is a good bit better looking than standard TV. It comes in two varieties, 480p30 and 480p60. While 480p30 is still considered standard definition, 480p60 gets it own catagory, know as EDTV, or enhanced-definition TV, which offers 60 vertical lines instead of an interlaced 30. The standard resolution of DVD, VCD, and SVCD is 480p. 480p has a non-widescreen apsect ratio of 4:3.

720p - 720p is considered to be an HDTV video mode, featuring 720 vertical lines of resolution, and a non-interlaced, or progressive scan, signal. 720p is also a widescreen format, with a 16:9 aspect ratio. The actual resolution of 720p is 1280 x 720.

1080i - 1080i's basic design is somewhat similar to that of 720p, but it features 1080 lines of vertical resolution, while the letter i stands for interlaced, or non-progressive scan. 1080i is considered to be an HDTV format. The term usually assumes a widescreen aspect ratio of 16:9, with a actual resolution of 1920 × 1080. Until recently, 1080i was the top standard for big-screen HDTV's.

1080p - 1080p is the new top standard in HDTV, featuring 1080 lines of vertical resolution, with the letter p representing progressive scan, or non-interlaced. 1080p is considered to be an HDTV format. 1080p has a widescreen aspect ratio of 16:9, with a total resolution of 1920 × 1080. Blu-Ray and HD-DVD both have uncompressed 1080p video onboard.

Addition to Audio > Connectivity

RCA Cable - Perhaps the most popular connection type to date, RCA cables can carry a huge variety of signal types, from video to digital audio to industrial machine networks. The name is taken from creator the RCA Company, who developed the connector in the early 1940's to connect turntables to radios. One of the chief downsides of the RCA cable is the fact that it can only carry one channel of anolog audio. Thus, for each channel, a seperate cable is required (the famed red and white jacks). RCA cables can also carry digital audio signals, and is often called coaxial digital when doing so. However, when carrying digital data, only one cable is required (usualy for up to 7 channels). An RCA connector looks like this.

TosLink - Developed by Toshiba to connect thier CD players to recievers, TosLink, or optical digital, quickly expanded into most other CD players regardless of manufacturer. TosLink is an optical cable, meaning it uses pulses of light to carry data. TosLink originaly carried raw data bitstreams, but the S/PDIF standard was later adopted as the standard format carried on TosLink cables, even though many DVD players or TV's use the cable to carry Dolby Digital or DTS signals. There are many end-connectors for TosLink, but by far the most popular for consumer devices is the JIS F05 type. This is what a TosLink connector looks like.


Addition to Audio > Surround Sound Formats


Dolby ProLogic/II - ProLogic is a psuedo-surrund encoding technology that is found in almost every Dolby Digital reciever. ProLogic will take any two-channel stereo mix and encode into a four-channel playback: Left, Center, and Right, plus a mono surround channel that's usually split between two rear speakers, with the addition of a subwoofer channel driven by the reciever. ProLogic is very popular for program material such as analog TV signals that are brodcasted in 2-channel.

Dolby Digital - Also know as AC-3, Dolby Digital is the most commonly used surround format for consumer products. As it's name suggests, Dolby Digital is a fully digital sound format that can be transmitted in any number of methods, the most commonly a RCA cable (also called coaxial digital) or by an optical cable (also called TosLink). Dolby Digital is also an adaptive format, meaning that it adjusts itself based on playback hardware and other factors. Most HDTV prodcasts or digital cable TV have Dolby Digital signals imbedded for consumers. Dolby Digital is also extremely popular in movie theaters, even though it is gradualy being replaced by DTS.
Dolby Digital is also the standard sound format for DVD movies.

DTS - A pioneering surround sound format, DTS, like Dolby Digital, can be transmitted in a variety of ways, including RCA or TosLink. DTS provides enhanced 6.1 matrix and DTS 6.1 discrete decoding. DTS technology is featured in a wide section of receiver/pre-amplifiers, DVD players and add-on components. DTS is an abbreviation for Digital Theater Systems.

For addition to Video > Connectivity:

HDMI - HDMI, short for High-Definition Multimedia Interface, is a full-digital cable that is capable of carrying high-definition video at either 720p, 1080i, or 1080p and uncompressed digital audio with up to 8 channels. HDMI is also used on Blu-Ray and HD-DVD players because of it's ability to transmit HDCP-encoded data. The benifits of HDMI include support for new formats in digital audio and full support for 1080p video, in addition to the simplicity of having one cable carry all of your signals. Disadvantages include a realativly high price-tag, and difficult wiring for those who have thier audio componets placed seperately from video componets. This is what an HDMI connector looks like.

Component Video - Component video, an anologe video format, uses three RCA-type cables to transmit standard or high-definition video from one source to anther. Componet video cables differ from standard RCA video cables in that each color of the spectrum (red, green, and blue) has it's own cable, for much increased bandwidth over standard anologe cables, in which all three colors are sent in one cable. Before component video, VGA was the only anologe method of transmitting high-definition video in a home theater. The advantages of component-video include a very low cost, and high availability of devices using the interface. Disadvantages include required use of a seperate cable for audio, and additional cable jumble in a cramped home theater setup. This is what a component-video connector looks like.

EDITS for Video > Connectivity


VGA (Video Grid Array) - An analog video connection often used for CRT displays. It uses a 15-pin D-Sub connector. Before component-video, VGA was the only anolog method of transmitting high-definition video. Newer display devices use DVI as an alternative connectivity option. VGA is primarily a computer interface, and is not found on many home-theater devices. This is what a VGA connector looks like.

DVI (Digital Video/Visual Interface) - An anolog or dgital video connection often used for LCD displays. The DVI connector on a device is given one of three names, depending on which signals it implements:

* DVI-D (digital only)
* DVI-A (analog only)
* DVI-I (digital & analog)

DVI is the only widespread standard that includes analog and digital transmission options in the same connector. The main application of DVI to a home theater is in componets dealing in video, suck as DVD players or HDTV's. Since DVI is capable of carrying a digital signal, it is often used in a home theater to transmit content enocded with HDCP (High-Bandwidth Digital Content Protection). The advantages of DVI include a relativly low cost compared to other digital cables, and easy conectivity. Disadvantages include decreased recording ability of HDCP-encoded content, and a bulky connector. This is what a DVI connector looks like.

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