The term CD is an abbreviation for Compact Disk. This technology was the first step in the arena of digital coding of information- that makes use of a novel coding methodology. A 14-bit code in a CD indicates a unit of computer memory. This technique of coding conjointly assists in the detection of error. The CD, for very long, worked as an acceptable form of replacement for the memory devices. It is because they used to offer a low-priced answer to people who wanted to store big chunks of data or media.
What is a DVD?
The term DVD is an abbreviation for Digital Versatile Disk. It provides a videotape that one can utilize in a tape recorder (also known as a Video Container Recorder) along with fixed storage that one can utilize in a computer. Here, the videodisc is capable of holding about seven times more info as compared to a CD. It can also acquire videos and media with commendable image quality, and users get random access to it. The construction of a videodisc is from a similar material used in the CD, but they have different construction methods. Thus, the layers are also different per unit area. You can use a DVD from both of its edges. It makes use of EFMplus and RS-PC as codes for correcting errors.
Difference Between CD and DVD
Parameters CD DVD
Full-Form The term CD is an acronym for Compact Disk. The term DVD is an acronym for Digital Versatile Disk.
Layer of Recording It has its metal layer or recording layer closer to the provided disk’s top. In this, the metal layer or recording layer rather stays close to the middle section of the disk.
Size The size of a typical CD is about 700 MB. The size of a given DVD is about 4.7 – 17 GB in range.
Total Layers of Pits It has a total of only one layer of pits. It has a total of double layers of pits.
Spaces present between Pits The total space present between the individual pits in a CD is about 0.834 (micrometer) μm. The total space present between the individual pits in a DVD is about 0.40 μm.
Space present between Loops The total space present between the spiral loops in a CD is about 1.6 μm. The total space present between the spiral loops in a DVD is about 0.74 μm.
Code of Correction CD uses the codes of EFMP and CIRC for correcting errors. DVD uses the codes of EFMplus and RS-PC for correcting errors.
Rate of Data Transfer The rate of data transfer in a CD is 1.4 Mbps (Megabytes per second) to 16 Mbps. The rate of data transfer is 11 Mbps.
Length of Channel Bit In the case of a CD, the channel bit length is 300 nm (nanometer). In the case of a DVD, the channel bit length is 113 nm.
Thickness A CD has a thickness of about 1.2 mm (millimeters). A DVD has a thickness of about 0.6 mm.
Numeric Aperture A CD has a numeric aperture of 0.45. A DVD has a numeric aperture of 0.6.
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Answers & Comments
Answer:
cd stands for compact disc
dvd stands for digital video disc
Explanation:
hope it helps you
Verified answer
Explanation:
What is a CD?
The term CD is an abbreviation for Compact Disk. This technology was the first step in the arena of digital coding of information- that makes use of a novel coding methodology. A 14-bit code in a CD indicates a unit of computer memory. This technique of coding conjointly assists in the detection of error. The CD, for very long, worked as an acceptable form of replacement for the memory devices. It is because they used to offer a low-priced answer to people who wanted to store big chunks of data or media.
What is a DVD?
The term DVD is an abbreviation for Digital Versatile Disk. It provides a videotape that one can utilize in a tape recorder (also known as a Video Container Recorder) along with fixed storage that one can utilize in a computer. Here, the videodisc is capable of holding about seven times more info as compared to a CD. It can also acquire videos and media with commendable image quality, and users get random access to it. The construction of a videodisc is from a similar material used in the CD, but they have different construction methods. Thus, the layers are also different per unit area. You can use a DVD from both of its edges. It makes use of EFMplus and RS-PC as codes for correcting errors.
Difference Between CD and DVD
Parameters CD DVD
Full-Form The term CD is an acronym for Compact Disk. The term DVD is an acronym for Digital Versatile Disk.
Layer of Recording It has its metal layer or recording layer closer to the provided disk’s top. In this, the metal layer or recording layer rather stays close to the middle section of the disk.
Size The size of a typical CD is about 700 MB. The size of a given DVD is about 4.7 – 17 GB in range.
Total Layers of Pits It has a total of only one layer of pits. It has a total of double layers of pits.
Spaces present between Pits The total space present between the individual pits in a CD is about 0.834 (micrometer) μm. The total space present between the individual pits in a DVD is about 0.40 μm.
Space present between Loops The total space present between the spiral loops in a CD is about 1.6 μm. The total space present between the spiral loops in a DVD is about 0.74 μm.
Code of Correction CD uses the codes of EFMP and CIRC for correcting errors. DVD uses the codes of EFMplus and RS-PC for correcting errors.
Rate of Data Transfer The rate of data transfer in a CD is 1.4 Mbps (Megabytes per second) to 16 Mbps. The rate of data transfer is 11 Mbps.
Length of Channel Bit In the case of a CD, the channel bit length is 300 nm (nanometer). In the case of a DVD, the channel bit length is 113 nm.
Thickness A CD has a thickness of about 1.2 mm (millimeters). A DVD has a thickness of about 0.6 mm.
Numeric Aperture A CD has a numeric aperture of 0.45. A DVD has a numeric aperture of 0.6.
Keep learning....pls follow me and mark brainlist...sis can I get your intro...do you watch ff's ???