Update cambi.md

Buddhiprabha · Jan 18, 2022 · 61e3338 · 61e3338
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@@ -6,7 +6,9 @@ CAMBI (Contrast Aware Multiscale Banding Index) is Netflix's detector for bandin
 
 For an introduction to CAMBI, please refer to the [tech blog](https://netflixtechblog.medium.com/cambi-a-banding-artifact-detector-96777ae12fe2). For a detailed technical description, please refer to the [technical paper](papers/CAMBI_PCS2021.pdf) published at PCS 2021. Note that the paper describes an initial version of CAMBI that no longer matches the code exactly, but it is still a good introduction.
 
-The current version of CAMBI is a [no-reference metric](https://en.wikipedia.org/wiki/Video_quality#Classification_of_objective_video_quality_models), and operates on a frame-by-frame basis (no temporal information is leveraged). To integrate it as part of the VMAF framework, which employs a [full-reference metric](https://en.wikipedia.org/wiki/Video_quality#Classification_of_objective_video_quality_models) API, CAMBI takes both a reference and a distorted video as its input. For simplicity, one can point the input arguments `--reference` and `--distorted` to the same video path.
+By default, the current version of CAMBI is a [no-reference metric](https://en.wikipedia.org/wiki/Video_quality#Classification_of_objective_video_quality_models), and operates on a frame-by-frame basis (no temporal information is leveraged). To integrate it as part of the VMAF framework, which employs a [full-reference metric](https://en.wikipedia.org/wiki/Video_quality#Classification_of_objective_video_quality_models) API, CAMBI takes both a reference and a distorted video as its input. For simplicity, one can point the input arguments `--reference` and `--distorted` to the same video path. 
+
+CAMBI also offers a full-reference mode which computes its score as `MAX(0, distorted_score - reference_score)`. This mode can be activated with the `--full_ref` command line option. In this case, both the `--reference` and `--distorted` inputs will be used.
 
 ## Scores
 
@@ -43,6 +45,10 @@ This will yield the output:
 </VMAF>
 ```
 
+## Bit depths
+
+CAMBI supports the same input bit depths as VMAF: 8, 10, 12 and 16. However, the computations in CAMBI will always be performed at the 10-bit level, and the other formats will be converted to 10-bit as a preprocessing step.
+
 ## Options
 
 The CAMBI feature extractor also supports additional optional parameters as listed below: