Another chip from the 1994 Camcorder. This one by Mitsubishi has no documentation available. I think the chip is likely the read/write amplifiers for the recording head. This is based on it being located on the board in a section labeled PRE/REC and that it was also covered by a ground shield indicating it is sensitive to noise.
The 48 pin device is a 3.58 x 4.06 mm two-level metal Bipolar chip
I have annotated the die photo to show there are at least three places where there are four identical blocks of circuitry. I think corresponding to four channels associated with the four read/write heads.
Inside the blocks you can see large driver transistors. Oddly despite being of similar size they have distinctly different layouts