Overview of ARIB Standards (STD-B41)
|STD Number||ARIB STD-B41|
|Standard Name||Transmission System for Digital Satellite Sound Broadcasting|
This standard intends to specify transmission system concerning ultrashort wave broadcasting which uses radio wave less than 2655MHz more than 2630MHz (hereinafter referred to as “digital satellite sound broadcasting”), and applies to digital satellite sound broadcasting.
Each standard provided separately shall be referred to about the standard such as coding system, multiplex system, etc. among standards related to digital satellite sound broadcasting.
According to “Technical Conditions on Digital Satellite Sound Broadcasting System using radio wave of the frequency in 2.6GHz band” from the report of a part dated 21 July 1999 “Technical Conditions related to Digital Broadcasting System” by Telecommunication Technical Council of former Ministry of Post and Telecommunications, based on “Ordinance that amends all standard transmission systems on digital broadcasting among standard television broadcasting and the like (Ordinance of the Minister of Internal Affairs and Communications No.26, 2003)” enforced on 17 January 2003 which is to provide technical standard, and based on the items provided in “Notification of the Minister of Internal Affairs and Communications (Notification No.43, 2003)” concerning the Ordinance, this standard records the contents involving the items which are agreed to provide normally on the operation besides them.
Guidelines on various conditions about recommended program transmission and equipment for transmission in practical operations are recorded as Attachment.
|CDM||Abbreviation for Code Division Multiplex
System that frequency band of signal is directly spread by the different spread code for each channel, plural channels are multiplexed in the same frequency band, and they are transmitted to the channel
|CDM channel||Each channel before code division. It is identified by Walsh code.|
|Spread code||Code which is used for spreading narrow band signal to wide band|
|Walsh code||A kind of orthogonal code. It is used for identifying CDM channel.|
|Pseudo random code||Code which is generated as pseudo random numbers|
|Pilot signal||Signal that is generated as a unit of 408 Bytes signal which consists of the signal in which error correcting outer code is added to synchronized signal, frame synchronized signal, super frame synchronized signal, and pilot information.|
|Pilot symbol||Data that has a specific pattern in order to assist signal synchronization in the receiver|
|Pilot information||Information about transmission control and so on related to code division multiplex|
|Gap filler||Assistant terrestrial radio equipment which broadcasts simultaneously the same program as satellite broadcasting station does, in the area such as the shade of buildings and so on where it is difficult to receive broadcasting by the satellite broadcasting station.|
|Direct amplifying type gap filler||Gap filler by the system that the broadcasting signal of 2.6GHz band is directly received, and it is transmitted again after amplifying to prescribed level.|
|Frequency transform type gap filler||Gap filler by the system that the signal which is transmitted by Ku band and so on is received, and it is transformed to 2.6GHz band, and it is transmitted after amplifying.|
2. Amendment History
|Ver.||Amendment or Enactment Date||Amendment summary|
According to the amendment of Broadcasting Act, “Standard transmission system on digital broadcasting among the standard television broadcasting and the like” (Ordinance of the Ministry of Internal Affairs and Communications No.87, 2009) 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.
Amendment according to the amendment for spurious regulation in the Ordinance of the Ministry of Internal Affairs and Communications No.118 Regulations for Enforcement of Radio Act, No.119 Ordinance Regulating Radio Equipment (extra Official Gazette No.179 issued on 9 August 2005), and Notification of MIC No.1228 Ordinance regulating Radio Equipment (space radio communication) (issued on 21 October 2005)
Chapter 2: Transmission System
2.3 Allowance of the strength of spurious emission or unnecessary radiation
2.3.1 Definition, Significance
22.214.171.124 Satellite broadcasting station
126.96.36.199 Radio station which broadcasts auxiliary satellite broadcasting
188.8.131.52 Frequency out of band area and in the boundary of spurious area
2.3.3 Interim measures
2.3.4 Standard based on former rules
☆Replacement edition is published for ver.1.0.