EM-4000H Series DVR System

H.264 DVR System

HC PC-based DVR



VIDEO NETWORK SERVER

User definable motion estimation settings controls the balance between encoder speed and quality.

Multiple reference frames of any combination of past and future frames, provides precise intra-prediction as well as improved robustness during packet loss while streaming over the network or Internet.

Unrestricted motion search uses reference frames that may be partly outside the frame improving network performance by predicting missing data.

Only the difference between motion vectors is saved, increasing the compression ratio.
Intra-prediction may be performed either on 4x4 blocks or 16x16.

Motion vector prediction is performed before the frame is prepared for compression (pre-DCT) improving prediction and compression performance.

Computation is more efficient because LEAD implements the traditional Discrete Cosine Transform (DCT) as an integer transform.

The LEAD H.264 encoder makes use of the SAD HADAMARD calculation to increase the compression ratio.

A context-sensitive de-blocking filter smoothes out internal edges, significantly improving the visual quality of the video. The filter strength depends upon the prediction modes and relationship between the neighboring blocks.

Employs Context-Adaptive Variable Length Coding (CAVLC) to encode transform coefficients.

The Context-Adaptive Binary Arithmetic Coding (CABAC) method continually updates frequency statistics of the incoming data and adaptively adjusts the algorithm, improving compression performance.

The LEAD H.264 encoder provides the user with control of the number and types of frames encoded into the video stream.

MPEG-4 Part 10 is a high quality compression developed by the Video Coding Experts Group (VCEG) together with the ISO/IEC Moving Picture Experts Group (MPEG). The technology is also known as AVC, for Advanced Video Coding.