Digital Video in VS .NET

Creation QR in VS .NET Digital Video
2.1.2 Digital Video
Recognize QR Code ISO/IEC18004 In .NET
Using Barcode Control SDK for Visual Studio .NET Control to generate, create, read, scan barcode image in VS .NET applications.
In addition to audio, video is the other most commonly used continuous media. A digital video sequence is divided into many video frames, each frame capturing one snapshot of the video scene. The video frames are typically captured at periodic time intervals, such as 25 frames per second (fps) in PAL-standard video and 29.9 fps in NTSC-standard video. In continuous media system, however, there is more exibility in the frame rate used, predominately due to the often limited network/server bandwidth for delivering the video data. In these applications it is common to use frame rates lower than the previous broadcast standards if network bandwidth is limited. Clearly, the reduction in frame rate will generate fewer data but at the expense of reduced visual quality (e.g., fast motion becomes jerky or jumpy).
Drawing QR In Visual Studio .NET
Using Barcode encoder for .NET Control to generate, create QR Code image in .NET applications.
Media Compression
Read Quick Response Code In .NET
Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET framework applications.
Video:
Barcode Printer In Visual Studio .NET
Using Barcode generation for .NET Control to generate, create barcode image in .NET framework applications.
. . .
Bar Code Decoder In .NET Framework
Using Barcode decoder for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
. . .
Encode QR Code 2d Barcode In Visual C#.NET
Using Barcode encoder for Visual Studio .NET Control to generate, create QR Code 2d barcode image in .NET applications.
Frame:
QR Generator In Visual Studio .NET
Using Barcode generation for ASP.NET Control to generate, create QR Code image in ASP.NET applications.
An Image or Bitmap
QR-Code Generator In Visual Basic .NET
Using Barcode encoder for .NET Control to generate, create QR Code image in Visual Studio .NET applications.
A Pixel
Making Barcode In .NET Framework
Using Barcode printer for .NET Control to generate, create bar code image in .NET framework applications.
Pixel:
Generate Data Matrix ECC200 In Visual Studio .NET
Using Barcode generation for Visual Studio .NET Control to generate, create Data Matrix 2d barcode image in .NET applications.
R G B or Y U V
Making Barcode In VS .NET
Using Barcode creator for .NET framework Control to generate, create bar code image in .NET applications.
Figure 2.2 Compositions of digital video
2/5 Industrial Drawer In .NET
Using Barcode creator for VS .NET Control to generate, create Code 2/5 image in .NET framework applications.
Each video frame is further sub-divided into a two-dimensional grid of pixels (Figure 2.2). The numbers of horizontal and vertical pixels are de ned by the resolution of the video. Each pixel further sub-divides into a number of color channels. The common color models employed in digital video are RGB, YUV, and YCrBr. In compressed video such as MPEG, the YCrBr color model is employed to exploit different properties of the human visual system (e.g., the human eye is more sensitive to intensity changes, i.e., the Y component, than color changes, i.e., the Cr and Br components). The following are some common video standards and their basic properties:
Generating Code 128 Code Set C In C#.NET
Using Barcode creation for Visual Studio .NET Control to generate, create Code 128 Code Set A image in Visual Studio .NET applications.
r Common Interchange Format (CIF), (ITU-TS H.261): r 352 288 for luminance (Y) r 176 144 for chrominances (U, V) r Raw data rate = 36 Mbps. r Quarter-Common Interchange Format (QCIF): r 176 144 for luminance (Y) r 176 144 for chrominances (U, V) r Raw data rate = 18 Mbps. r Digitizing NTSC Video Signal: r Sampling rate: Y(13.5 Mhz), U (6.75 Mhz), V (6.75 Mhz) r Digitizing NTSC video signal r Raw data rate = (13.5 + 6.75 + 6,75) 8 = 216 Mbps r Raw pixel resolution = 864 525 pixels (removing retrace, etc.) r Active video area = 720 486 pixels r Sub-sampling (4:2:2) (reduce bit-rate by 33%) r 8-bits per sample per signal channel r Net raw data rate after sub-sampling = 168 Mbps.
UPC - 13 Creator In .NET Framework
Using Barcode drawer for ASP.NET Control to generate, create GTIN - 13 image in ASP.NET applications.
Y (720 486), U (360 486), V (360 486)
Generate UPC Symbol In Java
Using Barcode drawer for Java Control to generate, create UPC-A image in Java applications.
Scalable Continuous Media Streaming Systems
Bar Code Generator In VB.NET
Using Barcode drawer for VS .NET Control to generate, create barcode image in VS .NET applications.
r High-De nition Video: r Resolutions up to 1920 1080 pixels r 30 fps r 24 bits per pixel r Raw data rate = 1.5 Gbps. r Emerging Ultra-High-De nition Video: r 4 times the resolution (and data rate) of HDTV.
Making ECC200 In Visual C#
Using Barcode drawer for VS .NET Control to generate, create Data Matrix 2d barcode image in Visual Studio .NET applications.
2.1.3 Media Compression
ECC200 Generation In Visual Basic .NET
Using Barcode generator for VS .NET Control to generate, create Data Matrix image in .NET applications.
From the previous discussions we can clearly observe that the raw data rates generated by highresolution audio and video are extremely high, even compared to today s broadband network technologies. Therefore, it is essential to apply compression to the media data to reduce the storage and bandwidth requirements to economical levels. Many extremely successful media compression standards have been developed over the years and some of them are summarized below:
Code 39 Full ASCII Generator In Visual Studio .NET
Using Barcode printer for ASP.NET Control to generate, create Code 3 of 9 image in ASP.NET applications.
r MPEG-1 [6 10]: r VCR-quality video up to 8 Mbps r Used in video-CD, CD-I and video-on-demand systems. r MPEG-2 [11 19]: r Broadcast quality video from 3 to >10 Mbps r Used in DVD, HDTV, and video-on-demand systems. r MPEG-3: r Originally slated for HDTV but later dropped due to the incorporation of HDTV into r MPEG-4 [20 35]: r Originally targeted at low-bit-rate video for video telephony systems. r Now expanded to a broad range of bit-rates up to high-de nition video. r The advanced video coding standard in Part 10 [29] of the MPEG-4 standard is also known
Generating Barcode In .NET
Using Barcode generator for ASP.NET Control to generate, create barcode image in ASP.NET applications.
as H.264. This advanced codec can achieve even greater compression ratio using more sophisticated compression algorithms. For audio and video compression a vast body of work has been conducted in the past several decades and there are also many excellent texts and chapters available in the literature [1 5]. Thus, instead of repeating materials available elsewhere, we will focus on the impact of media compression on media streaming. MPEG-2.