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"What is the best fast and reliable HD video converter software currently available?"

The process of converting video files to HD quality involves a series of complex algorithms and calculations, including compression and decompression of video streams.

HD video conversion can take up to 10 times longer than standard video conversion due to the increased data size and complexity of HD files.

The Human Visual System (HVS) is more sensitive to certain colors and hues, and HD video conversion software takes this into account by optimizing color correction and gamma correction.

When converting video files to HD quality, the software needs to resample the video's original frames to match the new resolution, which can lead to minor losses in image quality.

The International Telecommunication Union (ITU) defines HD video resolution as at least 720 pixels (1280x720) for 720p and 1920 pixels (1920x1080) for 1080p.

Despite the increased file size, HD video conversion often reduces the data size by using lossy compression algorithms like H.264 (AVC) or H.265 (HEVC), which sacrifice some quality for better compression.

The more powerful the computer processing unit (CPU), the faster the video conversion process, but it's essential to consider that excessive CPU usage can lead to system instability.

To optimize video conversion, software developers use various techniques, such as parallel processing, multi-threading, and pipeline processing to minimize processing times.

HD video conversion involves not only spatial resolution but also temporal resolution (frame rate), which can affect the overall video quality and convertibility.

Some video conversion software utilizes Deep Learning (DL) and Artificial Intelligence (AI) to optimize video compression, detection, and processing, but this is rare in the HD video conversion landscape.

Currently, there is no universal consensus on the optimal video resolution for HD quality, as different devices and platforms have varying display capabilities and limitations.

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