ArtsAutosBooksBusinessEducationEntertainmentFamilyFashionFoodGamesGenderHealthHolidaysHomeHubPagesPersonal FinancePetsPoliticsReligionSportsTechnologyTravel

What is the difference between DVD and Blu-ray and its resolution?

Updated on June 24, 2013


DVD, also known as Digital Video Disc or Digital Versatile Disc, is an optical storage media format. It was invented and devloped by a number of companies in 1995. The main usage is for data and video storage. DVD's have the same dimentions as compact discs (CD's), but have the capacity of storing more than six times as much data.

The capacity of a DVD is 4.7GB (single sided, single-layer), 8.5GB (single-sided, double-layer) and 9.4GB (double-sided, single layer).

Blu-ray which was officially released in 2006 is named due to a blue laser reading the disc which is able to read data at a higher density then the red laser used to read DVDs. The capacity is also a lot higher with 25GB single, 50GB double.

Most DVDs and Blu-rays have region codes restricting the use to only one particular area of the world.

Type of DVD formats


These a write-once format that is compatible with many existing DVD Players, Recorders and DVD-ROM drives. This type of DVD can only be used in DVD Recorders and Burners that support DVD-R or multi-format recording (DVD+R). The storage is 4.7GB which is around 2 hours of MPEG-2 video on standard speed.


These of similar to DVD-R but a re-writeable. Re-writing can be performed approximately 1,000 times before it is used up. DVD-RW disc are known to be less compatible then DVD-R. THey can only be used in DVD Recorders/Players that support DVD-RW recording or multi format recording. These also hold 4.7GB of data/video.


The DVD+ are a slightly different format although output and usage is the same. Only multi-format DVD Players/burners or DVD+ compatible players can use this type of DVD. Functionality wise it is the same as a DVD-R.


Same as DVD-RW but only compatible with multi-format players or DVD+ Players.


This type of DVD comes in two varieties. There are both cartidge and non-cartridges, single sided or double-sided. If used like a Hard Drive they can be very usefull since you can erase/re-write up to 100,000 times, you can use it record your favourite TV shows and over write numerous times like how we did using VHS. Out of all the formats the DVD-RAM is the least compatible and is typically used for recording and playback in the same DVD player/recorder.

Other type of DVD

 For larger storage capacity there are DVD-DL (DVD 9). The DL stands for dual layer, within the disc itself there is a second layer underneath the top transparent layer. The drive is able to access the second layer by altering the focus of the pickup lazer so the focal point is a fraction deeper. Accessing the second layer will often cause a very brief pause in the viewing of video.

Dual Layer DVD's have a capacity of 8.5MB, almost twice that of a single layer.

Only Dual Layer compatible drives can read this type of DVD. Most computers nowadays are equiped with DVD-DL compatible drives.

Multi-Region DVD

DVD's have a regional which allow motion pictures to control aspects of a release, such as date and content.

A player will typicaly allow you to switch over regions a fixed number of times before it is locked in at one region. Of course there are many players on the market that are multi-region and can play any DVD.

Another way around this is to use software which not only copies the DVD, but actualy remove the region code, leaving the DVD regionless for use in any player. By searching around the net you should be able to find free versions of the kind of software.


The resolution of a DVD is a large step up from VHS analogue however, on a large TV screen grainy areas can be noticeable, especially with darker shades. This is due to the resolution being 720 x 480 (480i), not HD.


A Blu-Ray video has a typical resolution of up to 1920 x 1080 which is full HD, and is very difficult to notice any grainy area on the screen, even in darker shades. The difference between DVD and Blu-Ray becomes very noticeable on larger TV sets. The frames per second is also faster and smoother with around 60 frames per second as opposed to around 25-30 frames per second on a regular DVD.

A Blu-Ray Disc holds 25 GB per layer as opposed to a standard DVD of 4.7 GB.

The next generation seems to be Ultra HD or 4k TV. 4k basically means a resolution of 4,000 pixels across the width of the TV which is 4x that of Full HD. Full HD may not be enough for larger TV's over around 50". Blue-Ray media and players will need to accommodate this higher resolution, but it should possible with newer compression CODECs.


    0 of 8192 characters used
    Post Comment

    No comments yet.


    This website uses cookies

    As a user in the EEA, your approval is needed on a few things. To provide a better website experience, uses cookies (and other similar technologies) and may collect, process, and share personal data. Please choose which areas of our service you consent to our doing so.

    For more information on managing or withdrawing consents and how we handle data, visit our Privacy Policy at:

    Show Details
    HubPages Device IDThis is used to identify particular browsers or devices when the access the service, and is used for security reasons.
    LoginThis is necessary to sign in to the HubPages Service.
    Google RecaptchaThis is used to prevent bots and spam. (Privacy Policy)
    AkismetThis is used to detect comment spam. (Privacy Policy)
    HubPages Google AnalyticsThis is used to provide data on traffic to our website, all personally identifyable data is anonymized. (Privacy Policy)
    HubPages Traffic PixelThis is used to collect data on traffic to articles and other pages on our site. Unless you are signed in to a HubPages account, all personally identifiable information is anonymized.
    Amazon Web ServicesThis is a cloud services platform that we used to host our service. (Privacy Policy)
    CloudflareThis is a cloud CDN service that we use to efficiently deliver files required for our service to operate such as javascript, cascading style sheets, images, and videos. (Privacy Policy)
    Google Hosted LibrariesJavascript software libraries such as jQuery are loaded at endpoints on the or domains, for performance and efficiency reasons. (Privacy Policy)
    Google Custom SearchThis is feature allows you to search the site. (Privacy Policy)
    Google MapsSome articles have Google Maps embedded in them. (Privacy Policy)
    Google ChartsThis is used to display charts and graphs on articles and the author center. (Privacy Policy)
    Google AdSense Host APIThis service allows you to sign up for or associate a Google AdSense account with HubPages, so that you can earn money from ads on your articles. No data is shared unless you engage with this feature. (Privacy Policy)
    Google YouTubeSome articles have YouTube videos embedded in them. (Privacy Policy)
    VimeoSome articles have Vimeo videos embedded in them. (Privacy Policy)
    PaypalThis is used for a registered author who enrolls in the HubPages Earnings program and requests to be paid via PayPal. No data is shared with Paypal unless you engage with this feature. (Privacy Policy)
    Facebook LoginYou can use this to streamline signing up for, or signing in to your Hubpages account. No data is shared with Facebook unless you engage with this feature. (Privacy Policy)
    MavenThis supports the Maven widget and search functionality. (Privacy Policy)
    Google AdSenseThis is an ad network. (Privacy Policy)
    Google DoubleClickGoogle provides ad serving technology and runs an ad network. (Privacy Policy)
    Index ExchangeThis is an ad network. (Privacy Policy)
    SovrnThis is an ad network. (Privacy Policy)
    Facebook AdsThis is an ad network. (Privacy Policy)
    Amazon Unified Ad MarketplaceThis is an ad network. (Privacy Policy)
    AppNexusThis is an ad network. (Privacy Policy)
    OpenxThis is an ad network. (Privacy Policy)
    Rubicon ProjectThis is an ad network. (Privacy Policy)
    TripleLiftThis is an ad network. (Privacy Policy)
    Say MediaWe partner with Say Media to deliver ad campaigns on our sites. (Privacy Policy)
    Remarketing PixelsWe may use remarketing pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to advertise the HubPages Service to people that have visited our sites.
    Conversion Tracking PixelsWe may use conversion tracking pixels from advertising networks such as Google AdWords, Bing Ads, and Facebook in order to identify when an advertisement has successfully resulted in the desired action, such as signing up for the HubPages Service or publishing an article on the HubPages Service.
    Author Google AnalyticsThis is used to provide traffic data and reports to the authors of articles on the HubPages Service. (Privacy Policy)
    ComscoreComScore is a media measurement and analytics company providing marketing data and analytics to enterprises, media and advertising agencies, and publishers. Non-consent will result in ComScore only processing obfuscated personal data. (Privacy Policy)
    Amazon Tracking PixelSome articles display amazon products as part of the Amazon Affiliate program, this pixel provides traffic statistics for those products (Privacy Policy)