unique audio

Guid: that is, globally unique identifier (globally unique identifier) is also called UUID (universally unique identifier ). Therefore, the guid is the UUID. GUID is a 128-bit long number, which is generally expressed in hexadecimal notation.AlgorithmThe core idea is to combine the machine's Nic, local time, and a random number to generate a guid. Theoretic

Audio Processing (I) audio files, audio processing audio files Audio files Audio files are data files stored after digital conversion of sounds. To understand audio data, you must first

this article reprinted to http://blog.csdn.net/u014011807/article/details/40187737What can you learn in this volume?Four ways to design audio players for a variety of applications:Based on the Audiotoolbox.framework framework. Play the system sound file.Based on the Avfoundation.framework framework. Play a variety of audio format files. Has advanced audio player

Audio Stream (proportion of redundant data): Let's take a brief look at the structure of the ADTS header: 1) The ADTS header is at the beginning of each AAC frame and is typically 7 bytes long (or 9 bytes, not seen). 2) The length of each AAC frame is fixed to 1024 sample (can be 1024*n, have not seen n>1 case). 3) Most of the information in the ADTS header is useless, only the sample rate (4bit), the number of channels (3bit) and the frame size (13bi

key represents the integrity constraints created to implement business rules. The confusion between indexes and keys is generally caused by the use of indexes in the database to implement integrity constraints. Next, let's take a look at the differences between primary key constraints, unique key constraints, and unique indexes in the database. SQL> select * fromv $ version; BANNER --------------------

Five lessons audio processing and DX Audio plug-in introduction Through the last lesson, you can record the singer's clean voice completely. The next step is to do audio processing for the clean vocals to get the best sense of hearing. Commonly used audio processing of the human voice generally includes the following

Analyze audio waveforms, add audio special effects, and add special effects to audio Waveforms I. PrefaceHello everyone, I am a technician of 19944, from Hunan. I am famous for my superb skill. I am currently working in TGideas part-time restructuring. Recently, our Minister aiden was working on a Motion mobile component library, which was not frequently used by

First, play audio in the HTML5Audio element-The audio element can be embedded in an HTML page, and the attributes of the element can be set to be automatically played, preloaded, and looped back.-The audio element provides play, pause, and volume controls to control650) this.width=650; "src=" Http://s1.51cto.com/wyfs02/M02/7E/3D/wKiom1b6LpjQvCMiAABCaU0pHzY845.png

Audio Bar Chart This is the Audio bar chart as shown in the following illustration: Because it's just a custom view usage, we don't actually listen to audio input, and randomly simulate some numbers. If you want to implement a static audio bar chart as shown above, I believe we should be able to quickly find ideas

Audioservicesplaysystemsound Audio Servicefor simple, no-mix audio, the Avaudio Toolbox Framework provides a simple C-language-style audio service. You can use the Audioservicesplaysystemsound function to play simple sounds. Follow these rules:1. Audio length less than 30 seconds2. The format can only be PCM or IMA43.

This article is mainly about Avaudioplayer, the other two see related articles. Avaudioplayer in the avfoundation frame, so we're going to import avfoundation.framework. The Avaudioplayer class encapsulates the ability to play a single sound. The player can initialize with Nsurl or nsdata, note that Nsurl can not be a network URL and must be a local file URL, because the Avaudioplayer does not have the ability to play network audio, but we can use a l

Author: little monk afa published in: Period 2008-03 of Microcomputer Preface "HD" is a complete system, not a single standard or product. In the HD era, both video and audio must meet the HD standard. What is high-definition audio? What are the benefits of high-definition audio compared with normal audio? Starting fro

"linux Audio" ALSA Audio Programming "essence" Preface: Here is a look at the meaning of each parameter and some basic concepts. Sample length: Sample is the most basic unit for recording audio data, with 8-bit and 16-bit common. Channel number (channel): This parameter is 1 for mono, and 2 for stereo. Frame: Hardwood records a sound unit whose length is the pr

(reprint) Common Audio Protocol IntroductionIntroduction and comparison of common audio protocols for conference TV white PaperFirst, the digital audio principle: The sound is actually a kind of energy wave, therefore also has the frequency and the amplitude characteristic, the frequency corresponds to the time axis, the amplitude corresponds to the level axis. U

This article mainly introduces the composition of AudioUnit This article is made up of your own understanding. If you have any errors, please contact our netizens for correction. Understand the architecture of Audio Unit Before we started, we realized audioUnit through an AudioUnit object, which is an Effect type AudioUnit of this type. This unit consists of many small scopes, scope has element, elementt has channel, stream format, and properties. Do

To play and record audio on iOS devices, Apple recommends that we use the Avaudioplayer and Avaudiorecorder classes in the Avfoundation framework. Although the usage is simpler, it does not support streaming; This means that before playing the audio, you must wait until the entire audio load is complete before you can start playing the

how to make video and audio time-stampinghttp://blog.csdn.net/wfqxx/article/details/5497138 1. Video time stamp PTS = inc++ * (1000/fps); Where Inc is a static, initial value of 0, each time the timestamp Inc plus 1. In FFmpeg, the code in pkt.pts= m_nvideotimestamp++ * (M_vctx->time_base.num * 1000/m_vctx->time_base.den); 2. Audio time stamp PTS = inc++ * (frame_size * 1000/sample_rate) The code in FFmpeg

Real-time audio and video domain UDP is the king In the Internet, audio and video real-time interaction using the Transport Layer Scheme has TCP (such as: RTMP) and UDP (such as: RTP) two kinds. The TCP protocol can provide a relatively reliable guarantee for data transmission between two endpoints, which is achieved through a handshake mechanism. When the data is passed to the receiver, the receiver checks

What is the difference between the unique key constraint of SQLServer and the unique index ?, Sqlserver Index I used to want to know what the difference was, but I forgot it because we seldom use the unique key constraint. A few days ago, my colleague gave me a script to constrain the uniqueness of a field and use the unique