[SVT-HEVC]For 4K and 480P resolution, the bitstream display garbage screen after setting "-nb" parameter to encode.

[GuCaixuan]

Test environment]
OS: Ubuntu 16.04.5 LTS
SVT CommitID: 4b40262

During run SVT-HEVC test with Commit ID 4b40262, found that the bitstream display garbage screen after setting "-nb" parameter to encode for 4K and 480 resolution.
I also checked this issue on 19144a6(CommitID ) version, it’s passed.

Sample Command line
SvtHevcEncApp -i Netflix_Crosswalk_3840x2160_10bit_60Hz_P420.yuv -b buffered_test_M8_Netflix_Crosswalk_3840x2160_10bit_60Hz_P420_Q49_20.265 -w 3840 -h 2160 -bit-depth 10 -fps 60 -intra-period 55 -n 20 -encMode 8 -compressed-ten-bit-format 0 -q 49 -color-format 1 -rc 0 -nb 20

SvtHevcEncApp -i ParkJoy_864x480_10bit_50Hz_P420.yuv -b buffered_test_M1_ParkJoy_864x480_10bit_50Hz_P420_Q48_20.265 -w 864 -h 480 -bit-depth 10 -fps 50 -intra-period 47 -n 20 -encMode 1 -compressed-ten-bit-format 0 -q 48 -color-format 1 -rc 0 -nb 20