I read somewhere that using an external disc drive results in a higher quality (i.e. wider bandwidth) recording than camcorder records on a miniDV tape. I use Sony HVR z5u and Z7u cameras so this is of interest to me. But, I'm not sure it's correct. The premise is that the HDMI port is very wideband capable and the external recorder is also capable of wideband recording, therefore, you can get higher quality footage by using an external disk recorder connected to the camera's HDMI port.
My question is, is the bandwidth of the signal at the HDMI port actually greater than that recorded on the tape? Is the compression algorithm applied to signals destined to be recorded on tape the same as the algorithm applied to signals going to the HDMI port?
The camera specs don't provide any guidance.