I found a reference to volleyball serving speeds of professional athletes in competition (10-90 percentile; max speed is in parentheses):
At 50km/hr (toward the lower end of serving speeds), a ball travels about 0.5m (nearly 20 inches) in 1/30 of a second (the time between frames). So 10 inches at 1/60 of a second.
How much blur there is in a single frame will depend on shutter speed. At 1/100 second, the ball will travel about 0.14m (5.5 inches).
At 50km/hr, 30fps and 1/100 second shutter, there is about 14 inches where the ball isn't seen (even as a blur).
At 50km/hr, 60fps and 1/100 second shutter, there is about 4 inches where the ball isn't seen (even as a blur).
As far as 1080i30 (frames/sec; 1080i is 30 frames/sec delivered as 60 fields (half-frame)/sec), 1080p30, 1080p60, 720p60: While ATSC 3.0 allows for 1080p60, I don't know that any broadcasters are broadcasting 1080p60. As for cable providers and set-top boxes (including those like TiVo OTA that receive broadcast signals), it may be difficult to figure out the original signal as many of those providers and boxes may convert the signal from one to the other (possibly multiple times).
When I looked at this back in 2013 on Comcast, ESPN was carried in 720p60 while PAC-12 network went with 1080i30. Also, see this 2017 article.
The above link to a Youtube recording of the game doesn't show pixelation to me. (Instead, it shows signs of being converted to the 720p60 version on Youtube because of time glitches (see the repeat at 70 seconds into the video).)
Per an Aug 2021 article, about 1/3 of US households are in range of at least one station with ATSC 3.0, while only about 2M TV sets are capable of taking advantage of it (my 2019 TV is not capable of ATSC 3). The ATSC 3.0 signals will have better compression but that doesn't mean that the broadcasters will choose to broadcast 1080p60 rather than 1080p30. Even if they broadcast 1080p60, it doesn't mean that the PAC-12 network cameras would be providing that signal.
| Men | Women | |
| Standing (Max) | 42-55 km/h (62) | 43-61 km/h (78) |
| Jump float | 40-75 km/h (87) | 40-62 km/h (80) |
| Power jump | 73-104 km/h (123) | 66-89 km/h (95) |
At 50km/hr (toward the lower end of serving speeds), a ball travels about 0.5m (nearly 20 inches) in 1/30 of a second (the time between frames). So 10 inches at 1/60 of a second.
How much blur there is in a single frame will depend on shutter speed. At 1/100 second, the ball will travel about 0.14m (5.5 inches).
At 50km/hr, 30fps and 1/100 second shutter, there is about 14 inches where the ball isn't seen (even as a blur).
At 50km/hr, 60fps and 1/100 second shutter, there is about 4 inches where the ball isn't seen (even as a blur).
As far as 1080i30 (frames/sec; 1080i is 30 frames/sec delivered as 60 fields (half-frame)/sec), 1080p30, 1080p60, 720p60: While ATSC 3.0 allows for 1080p60, I don't know that any broadcasters are broadcasting 1080p60. As for cable providers and set-top boxes (including those like TiVo OTA that receive broadcast signals), it may be difficult to figure out the original signal as many of those providers and boxes may convert the signal from one to the other (possibly multiple times).
When I looked at this back in 2013 on Comcast, ESPN was carried in 720p60 while PAC-12 network went with 1080i30. Also, see this 2017 article.
The above link to a Youtube recording of the game doesn't show pixelation to me. (Instead, it shows signs of being converted to the 720p60 version on Youtube because of time glitches (see the repeat at 70 seconds into the video).)
Per an Aug 2021 article, about 1/3 of US households are in range of at least one station with ATSC 3.0, while only about 2M TV sets are capable of taking advantage of it (my 2019 TV is not capable of ATSC 3). The ATSC 3.0 signals will have better compression but that doesn't mean that the broadcasters will choose to broadcast 1080p60 rather than 1080p30. Even if they broadcast 1080p60, it doesn't mean that the PAC-12 network cameras would be providing that signal.