This contribution provides additional information on the HDR video coding technology proposals by Qualcomm and Technicolor presented in JVET-J0021 and JVET-J0022. The proposed HDR technology is Color Volume Transform (CVT) which is applied in the Y’CbCr 4:2:0 sample domain. The CVT is implemented through Dynamic Range Adjustment (DRA) process which is applied as pre-processing at the encoder side, with the aim of improving the coding efficiency. At the decoder side, the inverse DRA process is applied.