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- UD-4 abstract "UD-4, also known as UMX or BMX, was a discrete 4-channel quadraphonic sound system developed by Nippon/Columbia (Denon).Only 35 to 40 items are encoded in this format, and it was marketed only in the UK, Europe and Japan.The UMX standard contains two subsystems, BMX, a basic 4-2-4 encoded matrix (different from Regular Matrix), and QMX, a 4-4-4 system.UD-4 is the process of modulating QMX onto a record with a process similar to CD-4, but also matrix encoded.The system suffered from incompatibility with regular stereo playback due to phase differences between the left and right channels.A BMX decoder could be used to play back UD-4 recordings, but, by adding a special cartridge and a UD-4 demodulator, two supplementary channels could be extracted and used to enhance directional resolution.UD-4 systems first encoded the four original channels into four new channels.Two of these new channels contained the original four channels, matrix encoded.The other two contained only band-limited localization information, and were encoded with carriers similar to the CD-4 system.UD-4 was less critical in its set-up than CD-4, because the carriers did not have to carry frequencies as high as those found in the CD-4 system.".
- UD-4 wikiPageID "43834129".
- UD-4 wikiPageLength "2339".
- UD-4 wikiPageOutDegree "10".
- UD-4 wikiPageRevisionID "634804000".
- UD-4 wikiPageWikiLink 4-2-4_encoded_matrix.
- UD-4 wikiPageWikiLink Analog_signal.
- UD-4 wikiPageWikiLink Category:Surround_sound.
- UD-4 wikiPageWikiLink Compatible_Discrete_4.
- UD-4 wikiPageWikiLink Denon.
- UD-4 wikiPageWikiLink Gramophone_record.
- UD-4 wikiPageWikiLink Pick-up_cartridge.
- UD-4 wikiPageWikiLink Quadraphonic_sound.
- UD-4 wikiPageWikiLink Regular_Matrix.
- UD-4 wikiPageWikiLink Vinyl_record.
- UD-4 wikiPageWikiLinkText "UD-4".
- UD-4 wikiPageWikiLinkText "UD-4/UMX".
- UD-4 capacity "Four stereo channels".
- UD-4 caption "UD-4 logo".
- UD-4 encoding Analog_signal.
- UD-4 hasPhotoCollection UD-4.
- UD-4 logo "UD-4_format_logo.png".
- UD-4 name "UD-4".
- UD-4 owner "Nippon/Columbia".
- UD-4 read Pick-up_cartridge.
- UD-4 type Gramophone_record.
- UD-4 type Vinyl_record.
- UD-4 use "Audio storage".
- UD-4 wikiPageUsesTemplate Template:Infobox_media.
- UD-4 wikiPageUsesTemplate Template:Merge_to.
- UD-4 wikiPageUsesTemplate Template:Quadraphonic_sound.
- UD-4 subject Category:Surround_sound.
- UD-4 comment "UD-4, also known as UMX or BMX, was a discrete 4-channel quadraphonic sound system developed by Nippon/Columbia (Denon).Only 35 to 40 items are encoded in this format, and it was marketed only in the UK, Europe and Japan.The UMX standard contains two subsystems, BMX, a basic 4-2-4 encoded matrix (different from Regular Matrix), and QMX, a 4-4-4 system.UD-4 is the process of modulating QMX onto a record with a process similar to CD-4, but also matrix encoded.The system suffered from incompatibility with regular stereo playback due to phase differences between the left and right channels.A BMX decoder could be used to play back UD-4 recordings, but, by adding a special cartridge and a UD-4 demodulator, two supplementary channels could be extracted and used to enhance directional resolution.UD-4 systems first encoded the four original channels into four new channels.Two of these new channels contained the original four channels, matrix encoded.The other two contained only band-limited localization information, and were encoded with carriers similar to the CD-4 system.UD-4 was less critical in its set-up than CD-4, because the carriers did not have to carry frequencies as high as those found in the CD-4 system.".
- UD-4 label "UD-4".
- UD-4 sameAs m.011v6r9m.
- UD-4 sameAs Q18355699.
- UD-4 sameAs Q18355699.
- UD-4 wasDerivedFrom UD-4?oldid=634804000.
- UD-4 isPrimaryTopicOf UD-4.