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Technology Insights on Multimedia provide guidance on audio/video compression and interface standards, techniques for encoding and decoding digital media, parts and construction guidelines for new-generation digital amplifiers.

"Also of Interest" and "Elementals" for July 21, 2008 Under the Hood: Handset holds surprise package Under the Hood - Update: Apple iPhone 3G exposed "Also of Interest" and "Elementals" for July 14, 2008 Video: Inside iPhone 3G Silicon is only the beginning Use microphone arrays for background acoustic noise suppression in portable devices--Part II Under the Hood: Intel and TriQuint surprise with iPhone 3G wins Understand LED-based white and color-mixing system design "Also of Interest" and "Elementals" for July 7, 2008 Use microphone arrays for background acoustic noise suppression in portable devices--Part I "Also of Interest" and "Elementals" for June 30, 2008 Using the Decibel - Part 5: The Phon, Audible Frequency Range, and THD Eliminating audio system noise from HDTV Using the Decibel - Part 4: The VU and the VI Instrument Understanding Class-D amplifier power supply requirements ESD and EMI hazards in mobile phones--Solutions for the audio system connector Panel display interfaces and bandwidth: From TTL, LVDS, TDMS to DisplayPort Silicon TV tuners kick the CAN Driving LED lighting in mobile phones and PDAs Using the Decibel - Part 3: Combining decibels and using log charts A matter of light, Part 4 --- PWM dimming Using the Decibel - Part 2: Expressing Power as an Audio Level Speaker equalization using FIR filters $100 BOM eludes first OLPC laptop "Also of Interest" and "Elementals" for June 2, 2008 A matter of light, Part 3---When to boost and buck-boost Cameras in handsets evolving from novelty to DSC performance, despite constraints Using the Decibel - Part 1: Introduction and underlying concepts Headphone amplifier selection criteria for portable audio applications "Also of Interest" and "Elementals" for May 26, 2008 Reduce click and pop noises in set-top boxes Under the Hood: Universal remote gets on grid IC Audio Power Amplifiers and Zobel Networks: One Size Does Not Fit All Under the Hood: Mature devices get Rolly rocking Power management in mobile devices--A view of energy conservation--Part V Use a "Linkwitz circuit" to equalize a closed-box audio loudspeaker "Also of Interest" and "Elementals" for May 5, 2008 Surround Sound: Psychoacoustics - Part 2 Under the Hood: Surveillance on a shoestring Under the Hood: Inside Sony's OLED TV Careful use of Class-D amplifiers preserves portable system battery life Using point-to-point differential signaling to drive large screen LCD screens Surround Sound: Psychoacoustics - Part 1 Under the Hood: Robot Guitar embeds autotuning Rapid progress in high-brightness LEDs for Projection TVs Acoustics and Psychoacoustics: Introduction to sound - Part 7 "Also of Interest" and "Elementals" for April 7, 2008 Under the Hood: Mini-teardown reveals Ford Sync's economical design Acoustics and Psychoacoustics: Introduction to sound - Part 6 Efficient power management for set-top boxes Embracing tunable white LEDs as the next generation of lighting Under the Hood: Gyro sensor liberates mouse Reducing power consumption in ultrawideband chips The multiple challenges involved in flash LED driver selection--and how to solve them "Also of Interest" and "Elementals" for March 31, 2008 Advanced Driver Assistance Systems push auto navigation utility Acoustics and Psychoacoustics: Introduction to sound - Part 5 Acoustics and Psychoacoustics: Introduction to sound - Part 4 The issue of image retention on Plasma TVs Tips and Tricks: The critical nature of cell phone camera packaging Under the Hood: Sonos brings multi-zone digital audio to life "Also of Interest" and "Elementals" for March 17, 2008 Power dissipation in portables: Design considerations using low-power CMOS ICs Acoustics and Psychoacoustics: Introduction to sound - Part 3 "Also of Interest" and "Elementals" for March 10, 2008 Acoustics and Psychoacoustics: Introduction to sound - Part 2 Class-D amplifiers energize audio in flat-panel displays Under the Hood: Evolution of the smart phone "Also of Interest" and "Elementals" for March 3, 2008 "Also of Interest" and "Elementals" for February 25, 2008 Tips on Trends: Design handsets using age and income Under the Hood: Flip Ultra camcorder - An ode to clean design "Also of Interest" and "Elementals" for February 18, 2008 Under the Hood: When is a chip not a chip? Distortion in power amplifiers, Part VII: frequency compensation and real designs Headphone Amplifiers: Choose the right topology for your application Under the Hood: Guitar Hero jams go wireless Next-generation surveillance system design "Also of Interest" and "Elementals" for February 11, 2008 Detecting active video Distortion in power amplifiers, Part VI: the remaining distortions Understand feature-based, application-specific switches to improve portable designs Distortion in power amplifiers, Part V: output stages PhlatLight-enabled LED DLPs offer new illuminating schemes for rear projection HDTVs "Also of Interest" and "Elementals" for January 28, 2008 Distortion in power amplifiers, Part IV: the power amplifier stages "Also of Interest" and "Elementals" for January 21, 2008 Amplifier considerations for driving ceramic (piezoelectric) speakers (Part 2 of 2) DACs for DSP, part 2: Interpolating and sigma-delta DACs Distortion in power amplifiers, Part III: the voltage-amplifier stage Amplifier considerations for driving ceramic (piezoelectric) speakers (Part 1 of 2) Power design challenges for Digital Flat TVs Under the Hood: FinePix undergoes postmortem Camera system analog video-filtering techniques DACs for DSP, part 1: DAC architectures Distortion in power amplifiers, Part II: the input stage Under the Hood: Low-cost phone is rich in features Measuring video quality: Can objective metrics match human eyes? Distortion in power amplifiers, Part I: the sources of distortion