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A Personal Video Recorder lets you control how you watch digital HD television. Record one show while watching another on the set top box, pause live TV, or skip through the ads. Our guide looks at what to consider when choosing a PVR.
A Personal Video Recorder (PVR) is a stand-alone unit that combines a digital set top box (STB) with an internal hard disk drive (HDD) on which it records TV content in digital format, eliminating the need for tapes or disks.

A digital tuner decodes television signals to be displayed on-screen. With all PVRs you can generally watch the channel you are recording – usually with the ability to pause and resume the show at any time – or watch a previously recorded show while recording another. Currently, PVRs can have one or two inbuilt tuners:
Today, most PVRs are high definition and have twin tuners; if the budget permits, opt for one of these for the additional functionality.
PVRs are available with either SD (Standard Definition) or HD (High Definition) tuners. High Definition Television (HDTV) offers a higher-detailed screen image than Standard Definition by using a greater number of pixels with a broader range of colours. HDTV refreshes the image on the screen more times each second than other television signal formats.
This is where recordings are stored, so it's a good idea to buy a PVR with a big hard drive. Hard drive size ranges up to 1TB. As a guide, a 250GB model will hold approximately 100 hours of standard definition recordings and half of that for high definition recordings.

The Electronic Program Guide (EPG) delivers information about the time and date of a program, plus its name and classification rating. Usually, there's a brief summary of the plot and a list of the major actors or presenters.
Setting up a recording is usually a matter of highlighting the desired program on the EPG and pressing the record button, or setting a "timer" to record at a later time.
Timeshifting is the ability to "pause and rewind" live television. This feature lets you put live television on hold and continue it at a later time, from exactly where you left off.
As PVRs lack DVD burners, there's usually no easy way to get recordings off them, which means you'll have to delete earlier recordings to make way for new ones. Some units offer transfer to a computer, most commonly via USB connection.
There are plenty of different video and audio connections, so you need to make sure your television is compatible with those on the PVR. These connections will vary depending on whether you're using Standard Definition or High Definition content:
Common PVR features to look out for are:

Like other PVRs, TiVo features: two high definition tuners; the ability to record, pause and rewind live TV; and an Electronic Program Guide. There's the choice of a 1TB or 320GB hard drive, too. However, TiVo offers some additional features that set it apart:
Basic Considerations SD vs. HD tuners: HD tuners can show SD programs, but not vice versa.
Hard drive: 250GB hold 100 hours of SD recordings and half of that for HD.
Timeshift: The ability to 'pause and rewind' live television.
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