#Audora hdr vs hdr express tv

I began working with high dynamic range imagery for feature film production at Digital Domain based on the work of Greg Ward Larson, and Paul Debevec back in 1999.

#Audora hdr vs hdr express tv

However, HDR for TV is certainly not just a marketing term, and I can't think of a more appropriate term for what HDR capable TVs are offering. The short answer is that the terms are substantively different in meaning, both technically and subjectively. I'm not sure when this happened but it seems that rec 2020 is referred to these days (at least on Wikipedia) as standard dynamic range (SDR) and rec 2100 is high dynamic range (HDR), but since UHDTV 'HDR' television sets existed prior to the release of rec 2100 it is possible that your 'HDR' set supports rec 2020 and not rec 2100.įurthermore, both rec 2020 and rec 2100 can represent the same colors within the triangle of the CIE 1931 chromaticity diagram pictured above, what is different is the optical transfer function and the gamma ramp, so in other words, the function that converts signal to color is different. In particular, rec 2100 defines two optical transfer functions that are different from rec 2020 perceptual quantization (PQ) and Hybrid Log-Gamma (HLG). The signal formats for rec 2020 include RGB and YCbCr, while rec 2100 also defines a third format, ICtCp which provides an improved color representation. Rec 2020 only defines 2 resolutions 4K (3840x2160) and 8K (7680x4320), while rec 2100 also defines 2K (1920x1080), thereby bringing the wider color gamut to what we already refer to as HD. This is another improvement over rec 709 which was only up to 60p. However, it gets more confusing than that.īoth rec 2020 and rec 2100 support frame rates from 23.976 up to 120 and only progressive frames, never interlaced which you may be familiar with. Rec 2020 and rec 2100 both feature the same wide color gamut (WCG) and it is typically the extra colors that are implied when HDR is mentioned. Essentially, it boils down to the bit-depth being 8 bits per color channel for rec 709 and either 10 or 12 bits per color channel for rec 2020).Īs of July 2016 another standard has entered the industry (rec 2100). HDR-TV provides the UHDTV color gamut as shown in the attached image. Reviewers are typically impressed with the extended gamut and have said that HDR-TV is a much more noticeable improvement to quality than higher resolution alone. The standard is in its infancy and will likely evolve through several generations before it matures.

HDR-TV (rec 2020) also defines two pixel resolutions (4K and 8K pixel widths) which are higher than the standard HD-TV resolution which is closer to 2K pixels wide. The standard will necessarily expand the bandwidth required to carry or transmit the signal. The standard is supposed to be backwards compatible which means you will only see the benefits of the wider gamut if you have a television that supports it, but if you don't you will still be able to view the stream in the narrower gamut. The color gamut is wider (see rec 2020 vs rec 709) but so is the resolution.

HDR-TV is (yet) another standard of video transmission.