In the demo below (“Bourne Supremacy” movie clip) the screen is split vertically.
On the left hand side (LHS) is the original clip. On the right hand side (RHS) marked “QVS” is the TVI compressed version of the same material.

We compare an original movie clip with TVI’s encoded version of the same clip. Both versions operate with the same parameters.

The original 1,813 frames of video runs at 30 frames per second, is in 8 bit color and is at a resolution of 1280 X 720 pixels per frame using a progressive scan method. The LHS requires 30 million bits per second (30Mbps) to render the video. The RHS requires just over 3 Mbps. TVI’s compressed version requires just one-tenth the Bit Rate to render the video. This offers a huge saving in line transmission costs. These line charges scale linearly with video size.


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TVI’s encoder compresses video information to a high degree. Typically the compression factor exceeds 98%. In the demo clip, the LHS uses 2.5 Giga Bytes (2,500,000,000 bytes) of data. After TVI’s compression the RHS uses just 23 Mega bytes (23,000,000bytes) of data. This demonstrates that TVI can use just 2% of the video information to render an almost exact replica of the original material. Such high compression offers huge storage savings. Since video material is usually streamed the video storage systems need to have fast access times. That type of storage is expensive. TVI’s encoder greatly reduces the cost of video storage.

The issue of video quality is subjective. It depends upon the transmission and encoding equipment, the type of monitor or screen upon which the video is shown, the lighting in the local environment and finally upon the characteristics of the viewers’ eyes. Most individuals have the ability to determine quality differences between two sets of images. Technically, the parameter used for objective quality estimates is the Peak Signal-to-Noise Ratio (PSNR) measured on the logarithmic Decibel (db) scale. For the average consumer, video quality represented by a PSNR of about 30db appears to be satisfactory. For TVI’s encoded video shown in the demo clip the PSNR was 50.11 db. Image quality improves with an increase in PSNR.

Other benefits of the TVI encoder include the ability to vary the bit rate to accommodate processing or line delays. This is referred to as Adaptive Bit Rate encoding. Also, the TVI encoder can begin to stream encoded video after only two frames of input from the source. This represents a latency of about 6.7 milliseconds. Currently TVI’s software encoder is a one-pass encoder. Many encoders require two passes through the encoder to achieve a high degree of compression. In addition, TVI includes a “Watermarking” option for users interested in Digital Rights Management (DRM) . Security is further enhanced by TVI’s 128 bit encryption option on encoded video.

Faster throughput + Lower storage requirement + Good security + Excellent quality =TVI Encoder