Repeating your question twice isn't enough to convince someone to do your homework for you. Unless you had $4.5 million in American currency, not British pounds, to bribe with.
The short answer is it makes the message smaller. This allows more data to be sent, or the same data to be sent with lower power. Lossless compression allows the original data to be restored by uncompressing. This is important for financial transactions! Some forms of compression are called lossy, or noisy, such as MP3. Lossy compression allows much greater compression, but at the expense of an imperfect reconstruction. Some compression algorithms are variable rate or allow different levels of compression. Usually the noisier the compression, the greater the compression ratio. I suspect the cell phone companies use different compression ratios to maximize profits at the expense of poor quality connections.
Go to school. And do your work. Then you'll get your answer.
I also agree with Jayne. The details section is for if you include details about your question, not for repeating it. Okay? Learn to read instructions, too.
Comments
Repeating your question twice isn't enough to convince someone to do your homework for you. Unless you had $4.5 million in American currency, not British pounds, to bribe with.
The short answer is it makes the message smaller. This allows more data to be sent, or the same data to be sent with lower power. Lossless compression allows the original data to be restored by uncompressing. This is important for financial transactions! Some forms of compression are called lossy, or noisy, such as MP3. Lossy compression allows much greater compression, but at the expense of an imperfect reconstruction. Some compression algorithms are variable rate or allow different levels of compression. Usually the noisier the compression, the greater the compression ratio. I suspect the cell phone companies use different compression ratios to maximize profits at the expense of poor quality connections.
Go to school. And do your work. Then you'll get your answer.
I also agree with Jayne. The details section is for if you include details about your question, not for repeating it. Okay? Learn to read instructions, too.