fec_block_width, fec_block_height schema minimum, maximum

[garethsb]

During Montreal workshop, the following question came up.

Where do the 4-200 ranges come from for fec_block_width, fec_block_height, here:

is-05/APIs/schemas/sender_transport_params_rtp.json

Lines 90 to 101 in d18748f

	"fec_block_width": {
	"type": "integer",
	"description": "width of block over which FEC is calculated in packets",
	"minimum": 4,
	"maximum": 200
	},
	"fec_block_height": {
	"type": "integer",
	"description": "height of block over which FEC is calculated in packets",
	"minimum": 4,
	"maximum": 200
	},

These ranges have been present since these parameters were introduced 7 years ago, but
I don't see anything in ST 2022-5:2013 that describes ranges for block width x height (L x D).

There are limits in ST 2022-6:2012 but they're wider than the IS-05 range...

And here's the same section from ST 2022-2:2007...