G.723.1 specifies a coded representation that can be used for compressing the speech or other audio signal component of multimedia services at a very low bit rate. in the design of this coder, the principal application considered was very low bit rate Visual Telephony as part of the overall H.324 family of standards.
G.723.1 has two bit rates associated with it. these are 5.3 and 6.3 kbit/s. the higher bit rate has greater quality. the lower bit rate
In previous versions of HTML5, if you wanted to insert audio and video into a webpage, you would have to install a plugin, such as the most common flash plugin. A lot of people in the first installation of a browser will encounter the browser is recommended to install Flash plugin, on the mobile side as well. If you want to watch video on the phone must install Flash plug-in, but the phone itself memory is very small this undoubtedly increased the mob
Linux Audio Programming GuideAlthough the advantages of Linux are mainly embodied in the network services, but in fact, there is also a very rich media function, this article is based on multimedia applications of the most basic sound as an object, how to develop the actual audio applications under the Linux platform, and also some common audio programming framew
In scenes where audio and video are re-encoded and need to be synchronized, there are several basic principles to follow (otherwise the audio and video will be stuck and not smooth.) With audio AAC encoding frequency 44.1k, video H264 encode 25 frame rate for example): 1. Ensure that the audio and video frame arrival
First, an overview of the WEBRTC audio processing flow, see:WEBRTC The audio session is abstracted into a channel channels, such as A and b for audio calls, a needs to establish a channel and b for audio data transmission. There are three channel, each channel contains codec and rtp/rtcp send function.In the case of a
This article translated from: http://developer.android.com/training/managing-audio/audio-focus.html
It is vital to consider how to interact with multiple potential audio playback programs. To avoid simultaneous playback of each music player, Android uses audio focus to control audi
Author: Yang xingping
The resources on the Internet are really rich and colorful, such as MP3, movie and TV series, and funny cartoons and Flash. However, in the face of the vast Internet, A lot of netizens often look at the Internet and sigh, because some resources are difficult to save to a local computer to listen to or watch them again using the conventional method.
Today, we will introduce the "audio and video probe". This software not only finds
1:7 Mouth 8 TongueSpeakers, headphones, and earpieceIs by: Audiomanager.setmode (audiomanager.mode_in_communication)Audiomanager.setspeakerhponeon (boolean value). These two are set. But some don't seem to support it.Switch speaker and handset on the M phone cannot switchAndroid Audiotrack Audio Playback analysisWhen the audio resource is playing, there are frequent conflicts, such as when the music is play
Android Audio Analytics1 Android Audio System framework? Multimedia framework:The multimedia framework is responsible for encapsulating the playback/recording class, connecting the Android audio decoding library for audio software decoding, and connecting the high-pass Openmaxil interface. The upper app directly invoke
1.2.1 Common formatsCommon audio formats are: CD format, WAVE (*. WAV), AIFF, AU, MP3, MIDI, WMA, RealAudio, VQF, Oggvorbis,AAC, APE.
CDThe audio quality of the CD format is relatively high. So to speak the audio format, CD is naturally the leading pioneer. In most playback software, the "hitOpen file Type ", you can see the *.CDA format, which is the CD track. S
IOS audio playback (4): Converting AudioFileSource: http://msching.github.io/blog/2014/07/19/audio-in-ios-4/preface
Next, the third articleAudioStreamFileLet's talk about this article.AudioFile. AndAudioStreamFileSameAudioFileYesAudioToolBoxIn the framework, it can also complete Step 1 described in the first article, read audio format information and perform fram
The previous article recorded the RGB/YUV video pixel data processing method, this article continues the previous article the content, records the PCM audio sampling data processing method. The location of the audio sample data in the video player's decoding process is shown.This paper introduces several PCM audio sampling data processing functions as follows:Sep
Author:It168.com reny
I. 3D sound effectsWith the continuous development of software and hardware, the traditional dual-channel single-layer stereo sound field cannot meet people's needs. In order to get a better three-dimensional feeling and space feeling, scientists use digital audio to generate a brand new sound-simulating 3D sound effects.In daily life, we use two ears to listen to things, obtain information from various sources, and then locate
Today see very good introduction audio development articles, reproduced Original address: http://msching.github.io/blog/2014/07/07/audio-in-ios/ Preface Music-related app development has been for some time, in the process of the app's player several changes I also therefore for iOS audio playback implementation has been a certain research. Write this series of bl
Basic knowledge about Android audio Development
Let's start with a piece of gossip. Some time ago I had a sentiment: Android development is not a way to go. It is just a platform that provides many encapsulated APIs, this allows you to quickly develop applications for specific services.
The real value lies in the integration of Android with specific business directions, such as Android and audio and video
iOS audio playback can be divided into short audio playback (e.g., audio effects, etc.) and long audio playback (for example: music and other main audio). The former does not need to control the progress, cycle, etc., while the latter requires precise control. Playing these
Http://article.ityran.com/archives/253
This translation is produced by tairan translation team. Please indicate the source for reprinting and inform tairan !!
Translation
Before I developed the iPhone, Ray had little knowledge about sound formats. I know the differences between some "WAV" and "MP3" sound formats, but I certainly cannot tell you exactly what formats "AAC" and "caf" are, I also don't know what the best way to convert audio files on Mac
IPhoneDeveloped audio 101 (Part 1): file and Data Types
Translator: Xia laiyou
Disclaimer (read only !) : The original translations of all tutorials provided by this blog are from the Internet and are only for learning and communication purposes. Do not conduct commercial communications. At the same time, do not remove this statement when reprinting. In the event of any dispute, it has nothing to do with the owner of this blog and the person
In the FFmpeg ultra-detailed comprehensive tutorial---------------a sample of reading PC camera video data and sending it as a live stream with rtmp protocol is done in the camera live text, but the audio support is not implemented, so the example is further perfected in this article and the video synchronization problem of live stream is analyzed in detail. , a code example is also given.
For the live stream, here only the synchronization of the send
There is a good audio FAQ. If you have time, go up and check it out.
Link: http://forum.doom9.org/showthread.php? T = 68300
The following part is reproduced:
General Audio procedures FAQCross-format techniques for encoding, decoding, and playback.
1. What is the difference between lossy, lossless, and uncompressed audio formats?
Uncompressed
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.