AV Technology - June 2008 - (Page 69) COMPARISON OF COMMON VIDEO CODECS CODEC MPEG-1 MPEG-2 SOURCE MPEG MPEG COMPRESSION Limited Better COMMENTS Interlaced only Interlaced and progressive; designed around SDTV Strong support of HDTV. Broad range of resolutions supported Not widely implemented Widely implemented the bit stream that is sent to the part of the codec that does compression. COMPRESSION There are two categories of compression: lossless and lossy. Lossless compression allows the data to be represented in fewer bits but also allows the procedure to recover all of the original data when it is decompressed. Zipping a file and disk compression are examples of this. It is based on a rather simple idea. Nearly all data is represented using an ASCII system in which each character is eight bits. In nearly all text information some characters appear more often than others. For example, space, e, and t are very common. Therefore, in lossless compression, such letters are represented in fewer than eight bits while characters that are uncommon such as z and q are represented in more than eight bits. Lossless compression rarely yields more than an 80 percent reduction in the number of bits needed. So, it is never used for audio or video MPEG-4 Part 10 (H.264) ITU-T Very good* WMV9/VC1 Flash Microsoft Adobe Very good Very good *MPEG-4 yields about the same compression as Flash and VC1. However, MPEG-2 requires about twice the bandwidth of MPEG-4 at the same level of resolution. MPEG-1 compares to MPEG-2 in this same manner. *Print version is FREE to qualified USA residents only. Publisher reserves the right to determine subscription eligibility. Digital version is available FREE to all USA and International residents. http://www.MyAVTechmag.com
Table of Contents Feed for the Digital Edition of AV Technology - June 2008 AV Technology - June 2008 Contents Precedent Corporate: Global Standardization Government: Strategic Technology Planning Education: It’s All Just a Click Pre-Empting Projector Breakdown Dealing With Technophobes Keeping Ahead of Technology Obsolescence Understanding Video Codecs Rules of Engagement Network, See & Learn Sound From the Heart Sportsbook Makes an Impact Upgrading an AV Image Product Review: Polycom’s RealPresence Experience HD Tech Horizons: A True AV Networking Standard? Product Spotlight: Digital Media Servers; Flat Panel New Products Ad Index AV MO: Calculating Fiber Optic Transmission Distance AV Technology - June 2008 AV Technology - June 2008 - AV Technology - June 2008 (Page Cover1) AV Technology - June 2008 - AV Technology - June 2008 (Page Cover2) AV Technology - June 2008 - AV Technology - June 2008 (Page 3) AV Technology - June 2008 - AV Technology - June 2008 (Page 4) AV Technology - June 2008 - AV Technology - June 2008 (Page Blowin1) AV Technology - June 2008 - AV Technology - June 2008 (Page Blowin2) AV Technology - June 2008 - Contents (Page 5) AV Technology - June 2008 - Contents (Page 6) AV Technology - June 2008 - Contents (Page 7) AV Technology - June 2008 - Contents (Page 8) AV Technology - June 2008 - Contents (Page 9) AV Technology - June 2008 - Precedent (Page 10) AV Technology - June 2008 - Precedent (Page 11) AV Technology - June 2008 - Precedent (Page 12) AV Technology - June 2008 - Precedent (Page 13) AV Technology - June 2008 - Precedent (Page 14) AV Technology - June 2008 - Precedent (Page 15) AV Technology - June 2008 - Precedent (Page 16) AV Technology - June 2008 - Precedent (Page 17) AV Technology - June 2008 - Corporate: Global Standardization (Page 18) AV Technology - June 2008 - Corporate: Global Standardization (Page 19) AV Technology - June 2008 - Government: Strategic Technology Planning (Page 20) AV Technology - June 2008 - Government: Strategic Technology Planning (Page 21) AV Technology - June 2008 - Education: It’s All Just a Click (Page 22) AV Technology - June 2008 - Education: It’s All Just a Click (Page 23) AV Technology - June 2008 - Pre-Empting Projector Breakdown (Page 24) AV Technology - June 2008 - Pre-Empting Projector Breakdown (Page 25) AV Technology - June 2008 - Pre-Empting Projector Breakdown (Page 26) AV Technology - June 2008 - Pre-Empting Projector Breakdown (Page 27) AV Technology - June 2008 - Pre-Empting Projector Breakdown (Page 28) AV Technology - June 2008 - Pre-Empting Projector Breakdown (Page 29) AV Technology - June 2008 - Pre-Empting Projector Breakdown (Page 30) AV Technology - June 2008 - Dealing With Technophobes (Page 31) AV Technology - June 2008 - Dealing With Technophobes (Page 32) AV Technology - June 2008 - Dealing With Technophobes (Page 33) AV Technology - June 2008 - Dealing With Technophobes (Page 34) AV Technology - June 2008 - Dealing With Technophobes (Page 35) AV Technology - June 2008 - Dealing With Technophobes (Page 36) AV Technology - June 2008 - Dealing With Technophobes (Page 37) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 38) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 39) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 40) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 41) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 42) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 43) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 44) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 45) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 46) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 47) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 48) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 49) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 50) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 51) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 52) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 53) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 54) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 55) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 56) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 57) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 58) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 59) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 60) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 61) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 62) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 63) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 64) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 65) AV Technology - June 2008 - Keeping Ahead of Technology Obsolescence (Page 66) AV Technology - June 2008 - Understanding Video Codecs (Page 67) AV Technology - June 2008 - Understanding Video Codecs (Page 68) AV Technology - June 2008 - Understanding Video Codecs (Page 69) AV Technology - June 2008 - Understanding Video Codecs (Page 70) AV Technology - June 2008 - Understanding Video Codecs (Page 71) AV Technology - June 2008 - Understanding Video Codecs (Page 72) AV Technology - June 2008 - Rules of Engagement (Page 73) AV Technology - June 2008 - Rules of Engagement (Page 74) AV Technology - June 2008 - Rules of Engagement (Page 75) AV Technology - June 2008 - Rules of Engagement (Page 76) AV Technology - June 2008 - Rules of Engagement (Page 77) AV Technology - June 2008 - Network, See & Learn (Page 78) AV Technology - June 2008 - Network, See & Learn (Page 79) AV Technology - June 2008 - Network, See & Learn (Page 80) AV Technology - June 2008 - Network, See & Learn (Page 81) AV Technology - June 2008 - Network, See & Learn (Page 82) AV Technology - June 2008 - Network, See & Learn (Page 83) AV Technology - June 2008 - Network, See & Learn (Page 84) AV Technology - June 2008 - Network, See & Learn (Page 85) AV Technology - June 2008 - Network, See & Learn (Page 86) AV Technology - June 2008 - Network, See & Learn (Page 87) AV Technology - June 2008 - Network, See & Learn (Page 88) AV Technology - June 2008 - Network, See & Learn (Page 89) AV Technology - June 2008 - Sound From the Heart (Page 90) AV Technology - June 2008 - Sound From the Heart (Page 91) AV Technology - June 2008 - Sportsbook Makes an Impact (Page 92) AV Technology - June 2008 - Sportsbook Makes an Impact (Page 93) AV Technology - June 2008 - Upgrading an AV Image (Page 94) AV Technology - June 2008 - Upgrading an AV Image (Page 95) AV Technology - June 2008 - Product Review: Polycom’s RealPresence Experience HD (Page 96) AV Technology - June 2008 - Product Review: Polycom’s RealPresence Experience HD (Page 97) AV Technology - June 2008 - Tech Horizons: A True AV Networking Standard? (Page 98) AV Technology - June 2008 - Tech Horizons: A True AV Networking Standard? (Page 99) AV Technology - June 2008 - Product Spotlight: Digital Media Servers; Flat Panel (Page 100) AV Technology - June 2008 - Product Spotlight: Digital Media Servers; Flat Panel (Page 101) AV Technology - June 2008 - New Products (Page 102) AV Technology - June 2008 - New Products (Page 103) AV Technology - June 2008 - Ad Index (Page 104) AV Technology - June 2008 - Ad Index (Page 105) AV Technology - June 2008 - AV MO: Calculating Fiber Optic Transmission Distance (Page 106) AV Technology - June 2008 - AV MO: Calculating Fiber Optic Transmission Distance (Page Cover3) AV Technology - June 2008 - AV MO: Calculating Fiber Optic Transmission Distance (Page Cover4)
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