Overview of ARIB Standards (STD-B42)
|STD Number||ARIB STD-B42|
|Standard Name||Receiver for Digital Satellite Sound Broadcasting (Desirable Specifications)|
This standard specifies minimum function which satisfies the needs of supposed receiving equipment in early stage of practical use, rating and desirable specifications, concerning receiver for digital satellite sound broadcasting.
This standard applies to mobile receiver and portable terminal with built-in decoder and descrambler for digital signal concerning digital satellite sound broadcasting which uses 2630-2655 MHz band.
|CDM||Code Division Multiplex
This is adopted by mobile communication (cell-phone) system such as IMT-2000, as a multiplex system resistant to fading which is a problem in mobile receiving.
|Gap Filler|| Equipment that re-transmits the same information as the satellite transmits by the same frequency, in order to cover “dead zone” where radio wave from satellite cannot reach because of buildings and so on.
Receiving equipment needs wide input range to receive radio wave from both satellite station and terrestrial equipment.
|LNA||Low Noise Amplifier
When transmitting faint signal such as received radio wave of satellite, from antenna to a receiver via cable, generally, the signal is transmitted via cable after amplifying it in low noise, so deterioration of signal to noise is suppressed. An amplifier with low noise used for such a purpose.
|SBR||Abbreviation for Spectral Band Replication
Spectral band can be extended with low bit.
SBR is the information that complements a part of information which was destroyed when using half rate sampling of AAC coding, and by adding it to quantized sample by half rate sampling, spectral band can be restored in the frequency area. Even the receiver which does not have the function for SBR decoding can decode AAC part, and it is backward compatible.
2. Amendment History
|Ver.||Amendment or Enactment Date||Amendment summary|
According to the amendment of Broadcasting Act, “Standard transmission system on digital broadcasting among standard television broadcasting and the like” (Ordinance of the Ministry of Internal Affairs and Communications No.87, 2011) was newly enacted (enforced on 30 June 2011) by shifting from “Standard transmission system on digital broadcasting among the standard television broadcasting and the like” (MIC Ordinance No.26, 2003).
At this time, provisions on digital satellite broadcasting were deleted from the Ordinance, so this standard is repealed.
|1.1||02.05.2004||·Standard about receiving equipment by using mobile receiver or portable terminal is added.
·Amendment of down mix function from multi-channel to 2 channel stereo.
·AAC-SBR system is added in sound coding system.