Update readmes with the tech blog reference

README.md

@@ -14,7 +14,7 @@ Also included in `libvmaf` are implementations of several other metrics: PSNR, P
 
 ## News
 
-- (2021-10-7) We are open-sourcing CAMBI (Contrast Aware Multiscale Banding Index) - Netflix's detector for banding (aka contouring) artifacts. Check out the [technical paper](resource/doc/CAMBI_PCS2021.pdf) published in 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). Also check out the [usage](resource/doc/cambi.md) page.
+- (2021-10-7) We are open-sourcing CAMBI (Contrast Aware Multiscale Banding Index) - Netflix's detector for banding (aka contouring) artifacts. Check out the [tech blog](https://netflixtechblog.medium.com/cambi-a-banding-artifact-detector-96777ae12fe2) for an overview and the [technical paper](resource/doc/CAMBI_PCS2021.pdf) published in 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). Also check out the [usage](resource/doc/cambi.md) page.
 - (2020-12-7) Check out our [latest tech blog](https://netflixtechblog.com/toward-a-better-quality-metric-for-the-video-community-7ed94e752a30) on speed optimization, new API design and the introduction of a codec evaluation-friendly NEG mode.
 - (2020-12-3) We are releasing `libvmaf v2.0.0`. It has a new fixed-point and x86 SIMD-optimized (AVX2, AVX-512) implementation that achieves 2x speed up compared to the previous floating-point version. It also has a [new API](libvmaf/README.md) that is more flexible and extensible.
 - (2020-7-13) We have created a [memo](https://docs.google.com/document/d/1dJczEhXO0MZjBSNyKmd3ARiCTdFVMNPBykH4_HMPoyY/edit?usp=sharing) to share our thoughts on VMAF's property in the presence of image enhancement operations, its impact on codec evaluation, and our solutions.

resource/doc/cambi.md

@@ -2,7 +2,7 @@
 
 CAMBI (Contrast Aware Multiscale Banding Index) is Netflix's detector for banding (aka contouring) artifacts.
 
-For a detailed technical description of CAMBI, please refer to the [technical paper](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.
+For an introduction to CAMBI, please refer to this [tech blog](https://netflixtechblog.medium.com/cambi-a-banding-artifact-detector-96777ae12fe2). For a detailed technical description, please refer to the [technical paper](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.
 

resource/doc/references.md

@@ -10,6 +10,7 @@ VMAF is an on-going project. It has gone through substantial updates since its i
   - [Optimized shot-based encodes: now streaming!](https://medium.com/netflix-techblog/optimized-shot-based-encodes-now-streaming-4b9464204830), March 9, 2018 -- tech blog describing systems design for the Dynamic Optimizer.
   - [VMAF: the journey continues](https://medium.com/netflix-techblog/vmaf-the-journey-continues-44b51ee9ed12), October 25, 2018 -- second tech blog on VMAF focus on new features and best practices.
   - [Toward a better quality metric for the video community](https://netflixtechblog.com/toward-a-better-quality-metric-for-the-video-community-7ed94e752a30), December 7, 2020 -- third tech blog on VMAF focus on speed optimization, new API design and the introduction of a codec evaluation-friendly NEG mode.
+  - [CAMBI, a banding artifact detector](https://netflixtechblog.medium.com/cambi-a-banding-artifact-detector-96777ae12fe2), October 12, 2021 -- tech blog introducing the CAMBI algorithm to detect banding artifacts.
 
 ### Academic Papers