- Apply predictive coding to the image fragment in Chapter 1
There are seven categories of prediction methods. Upon application of the method, it turns out that the result should be
- Comment on lossy versus loss less compression for the following images: a video telephone call, a movie, a medical X-ray, and a construction drawing for an aircraft.
Loss less coding is ideal for numerical documents since the original data is stored while the coding is done and hence it can be recovered. It is regarded as ideal for construction drawings and medical X-rays. Loss less coding is not regarded highly for high compression images. Hence, lossy coding had been discovered to suit the compression of high quality images such as a movie or a video telephone call.
- Using web-based and library research, sketch the history of the television standard from the first demonstrations of black and white television through to the acceptance of the DTV standard.
Earlier the images were purely in two colors, black and white. A number f horizontal lines, white in color were displayed that had the elements of a picture and were designed to display a particular picture. The expenditure of such type of coding and decoding was little since the data compression process was not very complicated.
With the advancement of technology, it was identified that 192 colors had to be used to present images of DTV standard. With this it was discovered that with the addition of a number of varied colors, the transmission process became slower. Varied coding systems had to be adopted to ensure that the result was acceptable. Hence, in order to speed up the process of transmission, the cost of transmission shoots up.
- Given that the standard HDTV image contains four times the number of pixels as standard television, how many standard TV signals could be transmitted in one HDTV channel? What are the cost implications to the broadcasters and the implication on number of available channels to the viewer if such as option is chosen.
Three standard TV signals can be transmitted through one HDTV channel. The cost will rise drastically since HDTV is more expensive. The increase in prices will directly affect the broadcasters as well as the viewers who will have to pay additional costs to view these channels.
