The HDMI output of the Apple TV 4K is hdmi 2.0a and hdmi 2.0a supports 18 Gbps bandwidth. Premium Certified Paugge hdmi 2.0b cable has 18 Gbps bandwidth, thanks to its superior quality for 4K 60Hz, HDR, Dolby Vision, Dolby Atmos as you can take advantage of the most excellent features by Apple TV 4K.
For HDR and Dolby Vision, HDMI cable must support hdmi 2.0a or hdmi 2.0b. Standart hdmi 2.0 cables do not support HDR and Dolby Vision. It should be kept in mind that many unqualified and fake cables, which do not support HDR and Dolby Vision, are sold on the market as hdmi 2.0
Premium Certified Paugge hdmi 2.0b cable supports receive images on your Apple TV 4K in the following formats;
4K SDR 60Hz YCbCr 4: 4: 4
4K SDR 60Hz RGB High
4K HDR 60Hz YCbCr 4: 2: 2
4K HDR Dolby Vision