VisualOn
 |
|
| Type | Private |
|---|---|
| Key people | Andy Lin (CEO) Yang Cai (Founder) Bill Lin (Founder) |
| Services | MediaPlayer Streaming Media |
| Website | http://www.visualon.com |
| Launched | 2003 |
| Current status | Active |
VisualOn is a Silicon Valley-based multimedia software company that provides high-definition audio and video entertainment to smartphones, tablets, laptops, connected TVs and other mobile and convergent devices. VisualOn's patented technology is modular and platform-agnostic. VisualOn supports streaming, VOD, mobile TV and other multimedia applications with quality levels rivaling hardware-based solutions.[citation needed]
VisualOn's software provides a client media player that can be integrated into third-party DRM providers, addresses audio and video post-processing, manages meta-data to support integration with social media sharing, and supports ad-insertion. The company’s proprietary codecs support industry standard formats including HEVC, H.264, MPEG-DASH and AAC.[citation needed]
VisualOn customers include content providers, technology companies and hardware manufacturers. VisualOn technology is deployed on eight out of the 10[citation needed] top device manufacturers and embedded on over 200 million devices[citation needed] in the global market. The company partners with a range of technology companies to ensure workflow interoperability[buzzword].
VisualOn was founded in 2003 by Dr. Yang Cai and Dr. Bill Lin. The company is headquartered in San Jose, CA, with offices in Shanghai, Taipei, Tokyo, South Korea, Germany and Finland. VisualOn joined the Open Handset Alliance in 2010.[1]
VisualOn AAC Encoder[edit]
VisualOn provided a simple Advanced Audio Coding (AAC) encoder in early versions of Android.[2] The encoder was derived from the 3GPP reference encoder[3] and supported only the AAC-LC profile in mono or stereo. Google replaced the VisualOn encoder with the more advanced Fraunhofer FDK AAC codec library as of Android 4.1 Jelly Bean.[4]
A cross-platform source distribution is maintained by Martin Storsjö as vo-aacenc. The latest vo-aacenc release is 0.1.3 (2013-07-27).[5] The code compiles into a shared library, libvo-aacenc. The media frameworks FFmpeg and Libav support audio encoding through libvoaac-enc.[6][7]
The VisualOn AAC encoder has been shown to be very low quality in ABX testing.[8] Of the four AAC encoders that can be used by FFmpeg, it is the least recommended option.[9]
References[edit]
- ^ "VisualOn Joins the Open Handset Alliance to Enhance the Multimedia Capabilities of the Android Platform". VisualOn. 2010-11-09.
- ^ "VisualOn AAC encoder source code". Android Git. Retrieved 4 January 2015.
- ^ "libstagefright AAC decoder legality should be checked/clarified". Android Issue Tracker. Retrieved 4 January 2015.
- ^ "Discussion regarding the release of the Fraunhofer FDK encoder". Hydrogen Audio. Retrieved 4 January 2015.
- ^ "vo-aacenc Releases". Retrieved 4 January 2015.
- ^ "AAC Encoding Guide". FFmpeg documentation. Retrieved 1 August 2014.
- ^ "Encoding AAC". Libav documentation. Retrieved 4 January 2015.
- ^ Kamedo2 (2012-07-29). "FFmpeg native encoder quality assesment" (in Japanese). Retrieved 5 January 2015.
- ^ "AAC Encoding Guide/FAQ". FFmpeg documentation. Retrieved 5 January 2015.
