Data Compression and Prefix-Free Codes Episode 5 of The Science of Information
Probe the link between entropy and coding. In the process, encounter Shannon's first fundamental theorem, which specifies how far information can be squeezed in a binary code, serving as the basis for data compression. See how this works with a text such as Conan Doyle's The Return of Sherlock Holmes.
Running Time
32 mins
Year
2015
Kanopy ID
1198242
Filmmakers
Languages
Subjects
Show More
Related videos
Error-Correcting Codes
Dig into different techniques for error correction. Start with a game called word golf, which demonstrates the perils of mistaking one letter for another and how to guard against it. Then graduate to approaches used for correcting errors in computer operating systems, CDs, and data transmissions from the Voyager spacecraft.
Unbreakable Codes and Public Keys
The one-time pad may be in principle unbreakable, but consider the common mistakes that make this code system vulnerable. Focus on the Venona project that deciphered Soviet intelligence messages encrypted with one-time pads. Close with the mathematics behind public key cryptography, which makes modern transactions secure--for now.
Neural Codes in the Brain
Study the workings of our innermost information system: the brain. Take both top-down and bottom-up approaches, focusing on the world of perception, experience, and external behavior on the one hand versus the intricacies of neuron activity on the other. Then estimate the total information capacity of the brain.
MEMS: Making Micro Machines
MEMS: Making Micro Machines is an overview of the manufacture and design of microelectromechanical systems. This video shows the fabrication, testing and packaging, and design of some of our most common MEMS devices. It features the fabrication of Hewlett-Packard's thermal inkjet printhead and covers the testing and packaging of Texas…
Silicon Run I
Silicon Run I uses live industrial footage to show the many processes necessary to manufacture microchips, including crystal growth, circuit design, and the wafer fabrication process for CMOS technology. Using close-ups of manufacturing processes and device animation, Silicon Run I provides a clear overview of front-end semiconductor manufacturing. It is…
Silicon Run II
Silicon Run II explores manufacturing after the silicon wafers have been fabricated. This film reviews IC fabrication and continues by showing how IC wafers are tested, sorted, and packaged into individual microchips. These devices are then assembled onto the printed circuit boards used in personal computers. They are also seen…
Silicon Run Lite
Silicon Run Lite combines key sequences and images from both Silicon Run I and Silicon Run II to show from the growth of silicon crystals through the assembly of a personal computer. Live industrial footage, microscopic filming, animation, graphics, and special effects give an up-close view of manufacturing. Silicon Run…
Silicon Run Deposition
Silicon Run Deposition uses 3D atomic animation and live manufacturing footage to provide a detailed close-up look at the process of thin film deposition in CMOS fabrication. It shows the chemical and physical reactions that create the dielectric and conductive layers of an integrated circuit. Silicon Run Deposition examines the…
Silicon Run Lithography
Silicon Run Lithography examines the role of photolithography in imaging and printing the many intricate layers of integrated circuits. Focusing on critical and non-critical mask levels of a CMOS transistor, this video takes a close look at the manufacturing materials, tools, and processes that have made more precise and complex…
Silicon Run Etch
This sixth video in the Silicon Run Series takes a close look at the etch process in semiconductor manufacturing, including chemical mechanical polish, or CMP. It shows how thin films of nonconductive, semiconductive, and conductive materials are sculpted into microchips. Following the fabrication process of a CMOS transistor, Silicon Run…
Silicon Run Implantation
Silicon Run Implantation takes a close look at the process of ion implantation. This video shows how ions are accelerated to high energies and directed into specific regions of the silicon substrate to change its molecular structure and alter its electrical properties. Silicon Run Implantation explores the various types of…
Silicon Run Series
This series features semiconductor and computer manufacturing. Each video includes rarely seen live industrial footage and explores technical processes using vivid animations and graphics.