![ Signal modulation is achieved by using the
‘Binary phase shift keying’[BPSK].
BPSK as amodulation technique ,where the
two phases of a signal are used to double the
data rate and hence it’s also known as 2-PSK
modulation.](https://image.slidesharecdn.com/mainproject-imagecompression-pptin2003-230107051518-987dd4eb/85/Main-project-Image-compression-ppt-in-2003-ppt-15-320.jpg)
Main project-Image compression -ppt in 2003.ppt
- 1. IMAGE COMPRESSION & TRANSMISSION THROUGH DIGITAL COMMUNICATION SYSTEM
- 2. Shaik Babu Chenamsetty Suresh Gadde Jhansi Guda Madhusudhan Reddy Under the guidance Of Prof. M.Venu Gopala Rao
- 3. The main aim of the project is to reduce the amount of data required to represent the digital image,using DCT or DWT, and the transmission of the compressed image through digital communication system.
- 4. Huffman and shannon coding,which remove coding redundancies ,when combined with the techniques like DCT & DWT helps in compressing the image data to a very good extent.
- 5. Source coding in the form of image compression at transmitter side and image recovery at the reciever side are the integral process involved in any digital communication system
- 7. A DCT expresses a sequence of finite data points in terms of sum of cosine functions oscillating of different frequencies. A DWT is any wavelet transform for which the wavelets are discretely sampled.
- 9. A wavelet is a wave-like oscillation with an amplitude that start out at zero,increases, and then decreases back to zero. It can typically be visualized as a "brief oscillation" like one might see recorded by a seismograph or heart monitor. A simple wavelet.
- 11. LL2 HL2 LH2 HH2 LH HL HH LH HL HH HL2 LH2 HH2 LL3 HL3 HH3 LH3
- 15. Signal modulation is achieved by using the ‘Binary phase shift keying’[BPSK]. BPSK as amodulation technique ,where the two phases of a signal are used to double the data rate and hence it’s also known as 2-PSK modulation.
- 17. A channel is used to convey an information from one or more senders to one or more recievers. A channel has a certain capacity for transmitting information,measured in Hz or data rate in bits/sec.
- 18. Generally,channel refers to a physical transmission medium like wire or logical connection over multiplexed medium such as radio channel.
- 19. In information theory,channel coding refers to,”however the channel is contaminated noise interference”,it is possible to communicate digital data nearly error free up to given maximum rate through the channel.
- 20. And the channel coding can be achieved by adding some redundancies in the transmitted data stream in a controlled manner.
- 24. We see that SNR & compressed ratio are directly affected by changes in quantization level & number of diagnols. As expected the SNR increases &compression ratio decreases by increasing the number of diagnols number of quantization levels and it can also be noticed that SNR decreases and compression ratio increases with the increase in block size.
- 25. Digital image processing using matlab - Rafael C.Gonzalez Digital signal processing -G.Proakis Information theory and coding -Ranjan bose Getting started with matlab -Rudra pratap