Bio | Alan Heirich
Native of Berkeley, California, raised in Ann Arbor, Michigan. Educated at California Institute of Technology (PhD, MS), University of California, San Diego (MS), and University of Michigan (BA with Honors in Computer Science). My Erdos number is four (via Christof Koch). I was born in Berkeley, California during the Free Speech Movement, and grew up in Ann Arbor, Michigan where I attended high sc
vaapi
VAAPI: VA-API is an open-source library and API specification, which provides access to graphics hardware acceleration capabilities for video processing. It consists of a main library and driver-specific acceleration backends for each supported hardware vendor. Notice: Project Has Moved Wiki location has moved to: https://01.org/linuxmedia/vaapi Libva project has moved to https://github.com/01org/
libde265 HEVC — H.265 High Efficiency Video Coding
HD and 4K video using a fraction of predecessor H.264 bandwidthHighest quality content even at low-bandwidth connections. The libde265 HEVC codec enables streaming services to simultaneously deliver HD and 4K UHD video content to more users and dramatically reduce streaming costs and network bandwidth. Open Source Software (LGPL)libde265 HEVC is provided and licensed under open source GNU LGPL (GN
The world’s fastest VP9 decoder: ffvp9 | Ronald S. Bultje
As before, I was very excited when Google released VP9 – for one, because I was one of the people involved in creating it back when I worked for Google (I no longer do). How good is it, and how much better can it be? To evaluate that question, Clément Bœsch and I set out to write a VP9 decoder from scratch for FFmpeg. The goals never changed from the original ffvp8 situation (community-developed,
Intel, NVIDIA To Support Google's VP9 Codec - Phoronix
Show Your Support: Have you heard of Phoronix Premium? It's what complements advertisements on this site for our premium ad-free service. For less than $4 USD per month, you can help support our site while the funds generated allow us to keep doing Linux hardware reviews, performance benchmarking, maintain our community forums, and much more. Intel, NVIDIA To Support Google's VP9 Codec Written by
VoIPで用いられる音声コーデックの詳細「音声コーデック比較のポイント」
符号データの情報量はビットレート（kbit/s）で表します．音声コーデックのビットレートはほとんどが2kbit/sから64kbit/sの間です．（表1） （図2） VoIPでは符号データにIP/UDP/RTPのヘッダ情報が加わりますので，それらの情報量を含めたビットレートを考慮する必要があります．例えば8kbit/sの音声コーデックを20msecのパケット長で使用する場合，符号データの20バイトにIPヘッダの20バイト，UDPヘッダの8バイト，RTPヘッダの12バイトが加算されて合計60バイトのパケットになります．これは24kbit/sのビットレートに相当します．同じコーデックでもパケット長を40msecにするとオーバヘッドが軽減されて16kbit/s相当になりますが，当然ながら遅延が増えてしまいます． 平均的なビットレートを下げるための技術で，無音圧縮とも呼ばれます．まずエンコーダ
IP電話の基礎（4）：ITpro
PCM：Pulse Code Modulation ADPCM：Adaptive Differential Pulse Code Modulation MP-MLQ：Multi-Pulse Maximum Likelihood Quantization ACELP：Algebraic Code Excited Linear Prediction CS-ACELP：Conjugate-Structure Algebraic Code Excited Linear Prediction SB-ADPCM：Sub-Band Adaptive Differential Pulse Code Modulation まず、PCM符号化方式であるG.711。ディジタル符号の音声は、聴感的に正しく再生するために、音声の振幅を14ビットのデータで表現しています。アナログ音声信号を圧縮しないでディジ
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GitHub - lu-zero/mfx_dispatch: Intel media sdk dispatcher
FFmpeg: libavcodec/qsvenc.c Source File
libmfx/libmfx/api/mfxvideo.h at master · hevz/libmfx
https://github.com/videolan/vlc/blob/master/modules/codec/qsv.c
GitHub - cisco/openh264: Open Source H.264 Codec
x265 Development - x265
iLBC Freeware - WebRTC
SILK
Xiph.org: Subversion Access
http://libvp62.sourceforge.net/
http://www.h7.dion.ne.jp/~matsu/feature/mpeg/basic/encode-picture.html
http://www.on2.com/vp7.php
http://forum.skype.com/viewtopic.php?t=30486&highlight=codec%20isac