1. JCTVC- J-154: Proposal for definition of levels in HEVC

2. 2 USNB comment on the Concept of Level Tiers The USNB recognizes that there is notable variation in the bit rate and buffer size constraints for different applications. It is therefore recommended that HEVC levels be defined with two tiers, where level nesting is supported within each tier, but levels between the tiers are not nested. With such a structure, support of the higher tier would imply support of the lower tier at the same or lower level. It is believed that this approach would be beneficial for product conformance and to enable support for higher resolution video without unnecessarily provisioning for greater resources. Confidential and Proprietary Comcast Information

3. 3 Companies Cable Television Labs, Cisco, Broadcom, Motorola Mobility, Magnum Semiconductor, Harmonic, Comcast Labs, Rogers Communications, Time Warner Nested within each level tier Higher Resolution Video w/o greater resources Reduces Decoder Costs in Applications Create Compliant Decoders (Product Conformance)

4. 4 Discussion Suggest names for level tiers (Consumer, High) Focus NOT whole table just two columns in table Suggest numbers for Max Bitrate and Max CPB size for each level Confidential and Proprietary Comcast Information

5. 5 Consumer Tier Picture Resolution (information only) Max luma pixel rate MaxLumaPR (samples/sec) Max luma picture size MaxLumaFS (samples) Max bit rate MaxBR (1000 bits/s) Min Compression Ratio MinCR MaxDpbSize (picture storage buffers) Max CPB size (1000 bits) 1QCIF or below552,96036,86412826350 2352x240@30p 427x240@25p 3,686,400122,8801,00026 2.1&640x360@30p6,912,000230,400*3,50026 3&720x480@30p, 720x576@25p, 854x480@30p, 960x544@30p 16,588,800 552,960** 5,00026 3.1960x544@60p 1280x720@30p 33,177,600983,04010,00026 4C1280x720@60p 1920x1088@30p 2048x1088@30p 66,846,7202,228,224** 12,000 46 4.1C1920x1088@60p 2048x1088@60p 133,693,4402,228,224 20,000 46 5C3840x2160@30p 4096x2160@30p 267,386,8808,912,896 20,000 66 5.1C3840x2160@60p 4096x2160@60p 534,773,7608,912,896 40,000 66 5.2C3840x2160@120p 4096x2160@120p 1,069,547,5208,912,896 60,000 66 6C7680x4320@30p1,002,700,80033,423,360 60,000 86 6.1C7680x4320@60p2,005,401,60033,423,360 120,000 86

6. 6 Confidential and Proprietary Comcast Information High Tier Picture Resolution (information only) Max luma pixel rate MaxLumaPR (samples/sec) Max luma picture size MaxLumaFS (samples) Max bit rate MaxBR (1000 bits/s) Min Compression Ratio MinCR MaxDpbSize (picture storage buffers) Max CPB size (1000 bits) 1QCIF or below552,96036,86412826350 2352x240@30p 427x240@25p 3,686,400122,8801,00026 2.1&640x360@30p6,912,000230,400*3,50026 3&720x480@30p, 720x576@25p, 854x480@30p, 960x544@30p 16,588,800 552,960** 5,00026 3.1960x544@60p 1280x720@30p 33,177,600983,04010,00026 4H^ 1280x720@60p 1920x1088@30p 2048x1088@30p 66,846,7202,228,224 48,000 46 4.1H1920x1088@60p 2048x1088@60p 133,693,4402,228,224 80,000 46 5H 3840x2160@30p 4096x2160@30p 534,773,7608,912,896 80,000 66 5.1H3840x2160@60p 4096x2160@60p 534,773,7608,912,896 160,000 66 5.2H3840x2160@120p 4096x2160@120p 1,069,547,5208,912,896 240,000 66 6H 7680x4320@30p1,002,700,80033,423,360 240,000 86 6.1H7680x4320@60p2,005,401,60033,423,360 480,000 86

7. 7 Confidential and Proprietary Comcast Information

8. 8 LevelMax luma sample rate MaxLumaPR (samples/sec) Max luma picture size MaxLumaFS (samples) Max bit rate MaxBR (1000 bits/s) Min Compression Ratio MinCR MaxDpbSize (picture storage buffers) Max CPB size (1000 bits) 1552,96036,86412826350 23,686,400122,8801,00026 313,762,560458,7525,00026 3.133,177,600983,0409,00026 462,668,8002,088,960 15,000 46 4.162,668,8002,088,960 30,000 46 4.2133,693,4402,228,224 30,000 46 4.3133,693,4402,228,224 50,000 46 5267,386,8808,912,896 50,000 66 5.1267,386,8808,912,896 100,000 86 5.2534,773,7608,912,896 150,000 86 61,002,700,80033,423,360 300,000 86 6.12,005,401,60033,423,360 500,000 86 6.24,010,803,20033,423,360 800,000 66