From: "Patrick Boettcher" <patrick.boettcher@xxxxxxx> > This would be an option, or vdr ignores the field CoderateL if Hierarchy > == 0 (because, afaik, CoderateL is just relevant if Hierarchy is enabled), Still, the broadcaster is violating the standards. ETSI EN 300 744 (the DVB-T transmission standard) defines for the TPS bits: | Non-hierarchical channel coding and modulation requires signalling of | one code rate r. In this case, three bits specifying the code rate | according to table 13 are followed by another three bits of value 000. And ETSI EN 300 468 (the DVB Service Information standard) defines for the terrestrial delivery system descriptor in the NIT: | code_rate: The code_rate is a 3-bit field specifying the inner FEC | scheme used according to table 44. Non-hierarchical channel coding | and modulation requires signalling of one code rate. In this case, | 3 bits specifying code_rate according to table 44 are followed by | another 3 bits of value "000". Those "another 3 bits" in both cases are the ones which hold the low-priority stream FEC rate in case of a hierarchial transmission. If the LP FEC rate is used, the bit combination 000 means 1/2. So if a DVB-T transmission is non-hierarchial, the LP FEC rate bits _are_ defined to be 000 (1/2). If they hold any other value, it is a violation of the standards. Regards, -- Robert Schlabbach e-mail: robert_s@xxxxxxx Berlin, Germany
