It’s the decoding format needed when your video source is a Dolby Surround-encoded videotape or stereo TV broadcast.ĭolby Pro Logic is a four-channel system, offering three channels of full-range sound in the left front, right front, and center channel speakers. Dolby Pro Logicĭolby® Pro Logic™ was the home theater surround sound standard for years, and is still a very common form of Dolby Surround. Now, we’ll offer a quick overview of Dolby Pro Logic. Dolby Digital decoders are Dolby Pro Logic decoders too - they automatically interpret Dolby Pro Logic signals and play them in that format, so upgrading to Dolby Digital doesn’t make your other favorites obsolete.
If you already have a substantial video library full of Dolby Pro Logic sources, don’t worry. There are a variety of ways to make connections between these different You also need a complete home theater speaker system and a TV. To experience 5.1-channel Dolby Digital sound, you need a DVD (many DVDs are encoded with 5.1-channel Dolby Digital - check to see if the DVD case says “5.1” on the back cover), a DVD player, an A/V receiver, and a Dolby Digital decoder (either as a separate unit, or built into the DVD player or A/V receiver). It’s a significant improvement on earlier surround formats like Dolby Pro Logic, because the full-frequency stereo surround speakers add more spacious ambience and clearer off-screen effects, while the dedicated subwoofer channel gives realistic bass impact to the faintest rumbles and loudest roars. This advanced home theater technology delivers pristine detail, incredible dynamic range and unparalleled sound localization.
Since all six channels are digital, they can be transferred - without loss - from the movie studio to your living room. Your Dolby Digital decoder then converts this digital bitstream back to six discrete audio channels for playback in your home theater. On its way to your home theater, a 5.1-channel Dolby Digital soundtrack is “squeezed” down to a single digital bitstream for reproduction on DVDs and HDTV broadcasts. The last two full-range, stereo channels of sound are sent to surround speakers, creating a spacious, ambient atmosphere and distinct special effects. A third channel plays through the center channel speaker (usually positioned right above or below the television’s screen, so dialogue seems “attached” to the faces on the screen). Two channels offer full-range stereo sound in left and right front speakers (your regular stereo speakers can fit this bill). In 5.1-channel sound, there are five full-range (3-20,000Hz) channels of sound, for impressive depth and precision. As a result, even though it can take the form of stereo, even mono, sound, Dolby Digital is often simply referred to as a “5.1-channel” system. It offers top-notch audio precision and depth, and much clearer dialogue than other surround formats or regular TV listening. The accuracy and flexibility of Dolby Digital have resulted in the development of Dolby Digital 5.1- channel surround sound.ĥ.1- channel surround is a much newer system than Dolby Pro Logic, but it has quickly established itself as the preferred format. As a result, it was chosen as the standard audio format for DVDs and High-Definition Television (HDTV) - a guarantee that it has a future. The fact that Dolby Digital is digitally encoded means that it can be stored and sent as a digital signal - and digital signals are not prone to degradation the way analog signals are. Introduced in movie theaters in 1992, Dolby Digital is simply a digital form of encoding audio data, which ensures accurate reproduction of sound.
Update - 2021.10.12 Audio Affair will give you £20 off all orders over £250 when you use the code 7RW20. I cannot tell for sure (tendency goes to clip A) which is the 180 or 90 degree clip because I curently have no possibility to play back the AC3 in direct 5.1 off my PC.īut anyways this is NOT a fair comparision.