This part of IEC 61834 is an extension of the SD specification (SD mode) and covers the features necessary to enable a DVCR to record and reproduce PALplus signals. While all DVCRs must have the capability of recording and/or playback in SD (SP) mode, PALplus capability is optional. For this Part 8, the data structure of a track is defined by APT = 000b which consists of four areas as described in 4.3.2 in IEC 61834-1 and AP1 = AP2 = AP3 = 000b. There are two methods for recording the PALplus signal on a DVCR: method 1: record the partially encoded PALplus signal; method 2: record the completely decoded PALplus signal. This part is concerned with "Method 1" (baseband helper recording) as this requires an extension to the DVCR SD specification IEC 61834-2. For "Method 2" the DVCR is equipped with a built-in PALplus decoder and the SD specification IEC 61834-2 applies unchanged.