TV + ,-./0 1 2 34567892:3 ; ?1 @ A. B$% C1 D EFG H8 I JKL2MG8 2 31N G FOPQ>"# 2RS3TA. $% U, 3 1 V#:W* 'GXYZ CV[\ V?H; ]US ^_`a, * ' bcdJ, efUCgh R1C8 i Vj1kH8lmnA. 9o> + ?pV[\"# qFM b31* 'GX(88-108 MHz)U DMB* 'GX(VHF Ch7~13), FM rGX(76~88MHz: VHF Ch5~6) Nps* 'GX2 bH8YZ31 , tDAB+, HD-Radio, DRM+ Vuvw 2YZ31 8x ./A. B$% C1 ]S^_ Vy3>Nz{1-2|8}cd2~'?>} E Vy 2&ZH8 C gh efU bE 0RF~k2 3>E A. AbstractThough the digital transition of terrestrial TV has been completed, the transmission system for terrestrial radio has not been determined and terrestrial radio still keeps its analog transmission. This study, under co-orientation model, aims to explore the cognitive difference in recognizing important factors to be considered in deciding the digital radio transmission system between the employees of terrestrial broadcasters and then crucial issues related to the factors are driven. It has been found that the most big cognitive difference among the employees of three major terrestrial broadcasters lies in selecting frequency band for digital radio transmission. But there was little difference of opinion on simultaneous production-transmission, efficiency of frequency usage, broadcast quality and standards of service. The most disputable point in transition to digital radio broadcasting is selecting the frequency band for digital radio between the frequency bands used for FM radio broadcast (88-108MHz), terrestrial DMB (VHF Ch7~13) and FM radio adjacent broadcast band (76~88MHz: VHF Ch5~6). So, the question concludes into the selection issue between DAB+, HD-Radio, and DRM+. To improve the quality of radio broadcasting service and enhance the satisfaction of listeners, it is desirable to allow to operate both production system and transmission station, to enhance high transmission efficiency with minimum transmission facility, and to permit new entrance of broadcasters.Keyword : Digital radio broadcasting, Transmission method, Frequency band, Co-orientation model (Regular Paper) 20 1 , 2015 1(JBE Vol. 20, No. 1, January 2015)http://dx.doi.org/10.5909/JBE.2015.20.1.122ISSN 2287-9137 (Online) ISSN 1226-7953 (Print)