audio digitization

2016-11-25 DORAWEBRTC series Wind net WEBRTC series Wind Net Source: Wind NET Series Author: Weizhenwei, fan network columnist Audio and video synchronization is the most intuitive user experience for multimedia products, and is the most basic quality guarantee for audio and video media data transmission and rendering playback. If the audio and video is not sync

I. Overview of the audio system is divided into the following layers: (1) Upper-layer interfaces of the audio system provided by the media library; (2) audioflinger serves as the middle layer of the audio system; (3) The hardware abstraction layer of audio provides underlying support; (4) The

Audio BasicsWhat are the important attributes of sound? Loudness (loudness) Loudness is the size of the various sounds that humans can perceive, that is, the volume. Loudness is directly related to the amplitude of sound waves. Tone (Pitch) The tone is related to the frequency of the sound, and the greater the frequency of the sound, the higher the tone the human ear perceives, or the lower it will become. Tone (Qu

I. Basic Concepts 1 bit rate: the number of bits required for encoding (compression) audio data per second. The unit is usually kbps. 2. Sound Intensity: the subjective attribute of a sound indicates the degree to which a sound is heard. The intensity of the sound changes, but it is also affected by the frequency. In general, the intermediate frequency pure audio is better than the low frequency and hig

Go from Android 4.1 audio system Change instructions to Android 4.1, English code abbreviation for JB. In the eyes of the Chinese people, the word jb is also a little related to animals. Google so frequently modified Android, finally launched a can be all day jb JB hanging in the mouth of the version. Later my article can also use JB to express the version number, one side with JB said Chairman Mao often said "strategic contempt." Please, according to

Introduction to the Android Audio FrameworkBasic audio knowledge What are the important attributes of sound? Loudness) The sound level is the volume of all kinds of sounds that humans can perceive. The sound intensity is directly related to the amplitude of the acoustic wave. Pitch) The tone is related to the frequency of the voice. When the voice frequency increases, the voice that the human ear

For common audio playback, using XAudio2 is sufficient. time is to kill a pig knife, funny is that I became a pigBack in Windows Vista, m$ introduced the new audio architecture UAA, where CoreAudio took over Dsound, wavexxx, and mediafundation, through Core audio APIs, The audio performance of Windows can be comp

In the previous study, video and audio playback were performed separately. This is mainly for the convenience of learning, after a period of study, the FFmpeg also have a certain understanding, this article introducesHow to use multithreading to play audio and video simultaneously (not synchronized), and the previous learning code is refactored to facilitate later extension.This article mainly has the follo

From: http://baike.baidu.com/view/3393911.html? Fromtaglist # sub3393911 It is mentioned in this article that audio tracks of these times can be directly transmitted to the power amplifier through HDMI for decoding and output. Introduction Next-generation HD audio tracks, simply put, are the following five specifications: lpcm (lossless compression), Dolby Digital plus (lossy compression), Dolby truehd (

The original Thai-Czech video in Beijing time November 4 officially renamed the Cloud Audio-visual Tetje. At the same time will officially embark on the road of normalization, and broadcast control platform, the southern media, Tencent video cooperation, the implementation of the content of the legitimate compliance, a comprehensive brand upgrade, bring more stable and guaranteed services. After cooperation, the Southern media of the licensee is respo

-----------------------------------------------------------------------------------------------------The JQuery HTML5 audio/video LibraryJplayer is the completely free and open source (MIT) Media Library written in JavaScript. A Jqueryplugin, (and now a Zepto plugin,) Jplayer allows I rapidly weave cross platform audio and video into your Web pages. Jplayer ' s comprehensive API allows you-to-create innovat

old drama, storytelling, drum book downloadI long-term to my daughter-in-law grandpa download all kinds of drama storytelling, his old request is relatively high, have been suffering from under, know find this method, after downloading such as flowing smoothly.This example uses Google Chrome. First we need to find an audio web site that can be played online, and then open it to play audio,This time press F1

Transferred from: http://blog.chinaunix.net/space.php?uid=10995602do=blogid=2918725 The process of audio and video is finished, and the next step is to see Audio and Video Synchronization (synchronization) problems. Opencore's approach is to set up a main clock, and audio and video are used as a means of output. In the Stagefright,

Decoding process: 1, read HiSilicon g726 audio data, HiSilicon g726 audio will be more than 4 bytes of HiSilicon header information. 2. Select FFmpeg g726 encoder for decoding. FFmpeg g726 decoder includes: av_codec_id_adpcm_g726, Av_codec_id_adpcm_g726le. Select the av_codec_id_adpcm_g726 decoder type if the HiSilicon g726 stream type is ASF, and select the g726 decoder type if the HiSilicon RFC3551 stream