The BD version is clearer than the HD version.
HD usually refers to formats with a physical resolution of 720p or above as high definition, which is expressed in English as High Definition, or HD for short. The so-called Full HD refers to the physical resolution of up to 1920*1080 progressive scan, that is, 1080p, which is the current top high-definition specification, so this kind of high-definition movie is called the HD version.
BD is the abbreviation of BlueDisk, which means "Blu-ray DVD" when translated into Chinese. It is the video and audio transcribed from the Blu-ray disc, and the picture definition is very high. The English abbreviation of BD is Blu-rayDisc, a high-definition movie version. This kind of movie is very clear but has a huge amount of data, occupying dozens of gigabytes of capacity. Only Blu-ray discs can hold it, so this kind of high-definition movie is called the BD version. .
Extended information:
Comparison between HD and BD
1. HD, generally referred to as high definition, has four meanings: high-definition TV, high-definition equipment, HD formats, HD movies, etc.
2. BD is the abbreviation of Blu-ray Disc, which is one of the high-definition formats with high compression rate and large storage capacity. Blu-ray or Blu-ray Disc (abbreviated as BD) uses a shorter wavelength (405nm) blue laser to read and write data, hence its name.
In brief, the relationship between the two: BD high-definition is a special high-definition.
Reference materials:
Baidu Encyclopedia-HD (high resolution)
Baidu Encyclopedia-Blu-ray Disc