Update CHANGELOG with new features and bug fixes Change-Id: I396126e7513c181e7b193792382d5b61736e622e

diff --git a/CHANGELOG b/CHANGELOG
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@@ -1,15 +1,41 @@
 yyyy-mm-dd next version
   This release is ABI compatible with the last release.
 
+  This release includes significant compression efficiency and perceptual
+  quality improvements for layered image encoding, in addition to bug
+  fixes.
+
+  - New Features
+    * Tuning modes AOM_TUNE_IQ and AOM_TUNE_SSIMULACRA2 now work with
+      inter-frame encoding modes (good-quality and realtime), enabling
+      efficient layered image encoding.
+    * Variance Boost (deltaq-mode 6) support has been extended to
+      include good-quality and realtime modes.
+    * New value 2 for use_fixed_qp_offsets: disallow the application of
+      per-frame QP offsets, enabling full control of each frame's QP, by
+      adjusting rc_cfg.cq_level between each encoded frame.
+
   - Compression Efficiency Improvements
+    * When encoding 2-layered images with AOM_TUNE_IQ vs. AOM_TUNE_SSIM:
+      - Good-quality mode: up to 15% gains at similar SSIMULACRA 2 scores.
+      - Realtime mode: up to 30% gains at similar SSIMULACRA 2 scores.
     * Some minor quantization matrix formula and delta chroma q tweaks for the
       AOM_TUNE_SSIMULACRA2 tuning mode, with up to 0.2% SSIMULACRA 2 score
       efficiency gains.
 
+  - Perceptual Quality Improvements
+    * AOM_TUNE_IQ improves the visual quality of layered image encoding
+      compared to AOM_TUNE_SSIM.
+
   - Speedups
     * Make Adaptive CDEF more decoder friendly by limiting CDEF application to
       only regions where high filter strengths are needed.
 
+  - Bug Fixes
+    * Commits 4cc0867f, 74aaa1ef: fix AOM_SCALING_MODE crashes when
+      restoration filtering or compound mask prediction modes are used by the
+      encoder.
+
 2026-03-17 v3.13.2
   This release includes several bug fixes. This release is ABI
   compatible with the last release. See