Update CHANGELOG for libaom v3.12.0
Bug: 394596176
Change-Id: Ib4e56b433fadab1d4a8d5cb4c8fd5b870f53ac6a
diff --git a/CHANGELOG b/CHANGELOG
index 275e500..fce8dc9 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,4 +1,4 @@
-2025-02-06 v3.12.0
+2025-02-10 v3.12.0
This release includes new codec interfaces, compression efficiency and
perceptual improvements, speedup and memory optimizations, and bug
fixes. This release is ABI compatible with the last release.
@@ -9,15 +9,26 @@
these internal functions from the ABI is a bug fix and does not break
ABI compatibility.
- Acknowledgment: The image quality optimizations in the new tuning
- option AOM_TUNE_IQ were originally developed for SVT-AV1-PSY by
+ Acknowledgments: The image quality optimizations in the new tuning
+ mode AOM_TUNE_IQ were originally developed for SVT-AV1-PSY by
Cole Ogaard, Gianni Rosato, Julio Barba, and Zakaria Djebrouni.
- New Features
- * New tuning option AOM_TUNE_IQ (image quality) for the
+ * New tuning mode AOM_TUNE_IQ (image quality) for the
AOME_SET_TUNING codec control (--tune=iq) in all-intra mode. The
feature detection macro AOM_HAVE_TUNE_IQ, if defined, indicates
- that AOM_TUNE_IQ is available.
+ that AOM_TUNE_IQ is available. The image quality optimizations in
+ AOM_TUNE_IQ were developed by using the SSIMULACRA 2 metric for
+ guidance and validated with subjective visual quality checks.
+ * New value 6 for the AV1E_SET_DELTAQ_MODE codec control
+ (--deltaq-mode): use modulation for all intra using Variance
+ Boost. Variance Boost is a variance adaptive quantization
+ implementation that modulates qindex depending on the ratio of
+ low-variance to high-variance 8x8 subblocks within a 64x64
+ superblock, as well as the actual variance of the subblocks
+ themselves.
+ * New value 3 for the AV1E_SET_ENABLE_CDEF codec control
+ (--enable-cdef): Enable CDEF adaptively based on frame qindex.
* In all-intra mode, the AOME_SET_SHARPNESS codec control now also
sets the loop_filter_sharpness syntax element in the bitstream.
Larger values increasingly reduce how much the filtering can
@@ -28,33 +39,47 @@
AV1E_SET_QM_MAX codec control is increased to 10. The default
values in good-quality and realtime modes remain unchanged (5 and
9, respectively).
- * New value 3 for the AV1E_SET_ENABLE_CDEF codec control
- (--enable-cdef): Enable CDEF adaptively based on frame qindex.
- * New value 6 for the AV1E_SET_DELTAQ_MODE codec control
- (--deltaq-mode): use modulation for all intra using Variance
- Boost.
- Compression Efficiency Improvements
* Tuning mode AOM_TUNE_IQ improves image compression efficiency on
the CLIC dataset by up to 12% for the same SSIMULACRA 2 score, up
to 14% for the same DSSIM score, and up to 17% for the same
Butteraugli score.
+ * ~3% BD-rate gains for speed 11 VGA camera mode.
+ * ~5% BD-rate gains for speed 11 on scroll clips screen mode.
- Perceptual Quality Improvements
* Adjust temporal filter strength for better visual quality.
+ * RTC screen: visual quality improvements for scrolling and for
+ scene/slide changes.
+ * RTC camera mode: visual quality improvements for speed 11 VGA.
- Speedup and Memory Optimizations
+ * Optimize the Arm Neon implementation of the loop filter functions
+ with an average uplift of 15 - 25% in microbenchmarks.
* Add the CDEF optimization for RISC-V.
* Help the compiler generate better vectorized code for variance
calculation and warped motion in generic CPU builds.
* Make several arrays const.
- Other Improvements
+ * Binary size reduction: 1 - 2% compared with last release, with
+ CONFIG_REALTIME_ONLY enabled, CONFIG_AV1_DECODER and
+ CONFIG_AV1_HIGHBITDEPTH disabled.
* Build: compile source files in parallel under MSVC.
- Bug Fixes
* Fix bug where metadata added with aom_img_add_metadata was lost
when frame scaling was used.
+ * Bug b:383306740: RTC: Fix to issues with scrolling for screen
+ content.
+ * Bug b:382465458: RTC: Fix to artifact for grayscale input.
+ * Bug b:380247338: RTC: Fix to encode_time spikes on scene/slide
+ changes.
+ * RTC: Fix to rate correction factor update for VBR screen mode.
+ https://groups.google.com/a/aomedia.org/g/av1-discuss/c/nJxECdg-7P8
+ * Bug b:378401081: RTC: Fix to cyclic refresh update for external RC
+ (rate control).
2024-10-24 v3.11.0
This release includes perceptual quality improvements, binary size reduction
