The option allows the display of Dolby E, Dolby Digital and Dolby Digital Plus metadata present in a selected audio stream and determines whether the Dolby-E packet is timed correctly on the SDI video stream. The Dolby metadata may be monitored from any of the SDI input embedded audio channel pairs or the AES input.
Using the Audio menu > Dolby audio will present the full analysis display which forms the major analytical tool.
The Dolby metadata screen carries primary information including signal source, Dolby-E ‘guard band’ timing, CRC errors, program channel and metadata detail. The characters shown in white will only be presented when a Dolby signal is introduced into the unit.
Peak audio levels included in the Dolby-E meta data packet are displayed allowing the user to select the appropriate set of meters to display Dolby levels which will follow the selected Dolby-E source. Logging for Dolby E errors, Timing, Common metadata and Program metadata can be also be controlled.
Dolby Analysis
The Dolby Analysis option ( PHRXO-BDA) displays Dolby E, Dolby Digital or Dolby Digital Plus meta data present in a selected audio stream and determines whether the Dolby packet, embedded in the SDI video stream, is timed correctly.
Dolby E, Dolby Digital and Dolby Digital Plus are audio encoding and decoding technologies developed by Dolby Laboratories.
Dolby E supports up to 8 channels of lossless compressed audio (mono, stereo, 5.1 or 7.1) for a primary programme and optional ancillary programs. This option allows analysis of programme types such as Dolby 7.1 (which uses eight channels to provide surround sound) that is in common use. Dolby Digital (AC3) supports up to six channels of lossy compressed audio (mono, stereo or 5.1) that form a single ‘program’. This option allows analysis of Dolby 5.1 (which uses all six channels to provide surround sound) that is in daily use.
Dolby Digital Plus supports up to 20 channels of lossless compressed audio (mono, stereo, 5.1, 7.1 up to 13.1) and optional ancillary programs. This option allows analysis of programme types such as Dolby 7.1 (which uses eight channels to provide surround sound) that is in common use.
Checks can be made to see that the Dolby packet has been created correctly and transferred transparently, unaffected by routers/switchers, satellite links, etc