Difference between DVR and DVD

Key difference: A DVR is a recorder, while a DVD is a storage device.

DVR

DVR (Digital Video Recorder) is a general consumer device, which records the video in live modes. It is also sometimes referred to as a Personal Video Recorder (PVR). The video can be recorded into the USB flash drive, SD memory card, and SSD or other local or networked mass storage device. It provides desirable features like the consistent image quality and transferring of data to a computer, CD, or DVD, which proves it more advantageous in comparison with the other devices. Its convenient search function allows users to quickly locate the show, or specific scene, that they want to watch. The DVR also facilitates the television set-top boxes (STB) with various multiple features, some of which are: disk recording, portable media players (PMP) with recording, and the camcorders that record into the secure digital memory cards.

DVD

DVD (Digital Versatile Disc or Digital Video Disc) is a storage medium to store the various forms of digital contents. It works on a type of optical disc technology, and holds a minimum of 4.7 GB of data. DVDs are commonly used as a medium for digital representation of movies and other multimedia presentations that combine sound with graphics. The DVD specification supports disks with capacities of from 4.7GB to 17GB and access rates of 600KBps to 1.3 MBps. The DVDs are backward compatible with CD-ROMs. A DVD can also be read or accessed on a DVD Player. The new generation DVD players can also read CD-R disks. It uses the MPEG-2 format to compress the video data. A DVD is a digital optical storage provider, which has a higher capacity to store the digital and multimedia data to store in it. They are used in DVD-Video consumer digital video format and in DVD-Audio consumer digital audio format. They are also used in authoring the DVD discs, which are written in a special AVCHD format to hold high definition material. The DVD data discs are different types of discs that hold a special form of data.

Comparison between DVR and DVD:

	DVR	DVD
They are	DVR is a recording medium.	DVD is a storage medium.
Full form	Digital Video Recorder	Digital Versatile Disc or Digital Video Disc.
Storage	DVR recorder stores and writes the recorded video to an internal hard drive.	DVD recorders store data on recordable discs, usually DVD-R/RW and DVD+R/RW.
Working	DVRs connect through the television signal and provide an onscreen guide for watching and recording TV.	DVD work more like traditional VCRs with programmable recording times.
Efficiency	It allows the viewer to stop and pause (stop) the live television.	The older version does not allow the viewers to pause or rewind the television.
Cost factor	They are costly in comparison to the DVD.	They are cheaper as compared to the cost factor.
Requirement	Here a monthly subscription is required.	Here a monthly subscription is not required.