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Featured Design Center |
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Eliminating audio system noise from HDTV
Understand how hardware system and software functionality issues cause pops and clicks in the HDTV signal chain and how to prevent them.
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TV2/Home Entertainment
Eliminating audio system noise from HDTV
Understand how hardware system and software functionality issues cause pops and clicks in the HDTV signal chain and how to prevent them.
CEC-enabled HDMI system design for multi-vendor compatibility
Defined as an optional feature in the HDMI specification, CEC is based on the AV Link function defined in the European SCART specification. Unfortunately, many well-known brands have taken advantage of CEC's customization options to create equipment lines that only deliver "one touch playback" or other CEC-enabled features within their own brand. A look at implementing the CEC spec, and tips for maximizing interoperability with other brands in the current environment.
Understanding Class-D amplifier power supply requirements
This article reviews the steps necessary - including equations and examples - to determine the power supply requirements for a Class-D audio amplifier.
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Portable Audio
Avoiding ESD and EMI hazards in mobile phone audio interfaces
This article briefly discusses the causes and consequences of ESD and EMI hazards in the audio system of mobile phones. The uses of ESD suppressors and EMI filters to avoid these hazards are discussed. Finally, three currently available solutions are compared.
Headphone amplifier selection criteria for portable audio applications
This article examines key criteria - including topology, performance, cost, size, and power supply requirements - that system designers need to carefully factor in when designing headphone amplifier and output stage circuitry that connects to the headphone load.
How Bluetooth and 802.11 will team up to deliver high-speed wireless connections
The Bluetooth 802.11 AMP spec delivers a means to offer a dramatically improved user experience with an absolute minimum of redesign. An essential component is the ability to maintain a link to a WLAN access point before, during, and after using the 802.11 radio as a Bluetooth high-speed channel.
See all Portable Audio »
Automotive Sound
Time partitioning drives faster software integration for telematics and infotainment: Part 2 - Simulation code development
Allocating a set portion of CPU time to each software subsystem prevents any one monopolizing CPU cycles needed by the others, for a stable runtime environment that development teams can build and verify individually.
Time partitioning drives faster software integration for telematics and infotainment: Part 1 - Time problem, constraints, and a simulation model
Allocating a set portion of CPU time to each software subsystem prevents any one monopolizing CPU cycles needed by the others, for a stable runtime environment that development teams can build and verify individually.
H-Bridges provide 'smart power' for automotive SoC applications: Part 2 - Architectures and circuit protection
From electric motor controllers to Class D amplifiers, efficient mixed-signal integration is vital in design, and saving energy and cost. Part 2 of this article examines driver architectures and circuit protection.
See all Automotive Sound »
Digital/Satellite Radio
Understanding HD Radio: The program audio chain - Part 4
The fourth and final part of this excerpt from the recently released "The IBOC Handbook" concludes with a discussion of PSD Harmonization with RDS, PSD Transport and PSD metadata.
Jitter, Noise, and Signal Integrity at High-Speed: A Tutorial--Part IV
This excerpt from "Jitter, Noise, and Signal Integrity at High Speed" offers an historical overview of jitter, noise, BER, and signal integrity.
Understanding HD Radio: The program audio chain - Part 3
Part 3 of this series discusses Program Service Data (PSD) - various types of text information that describes program content - and how it's prepared for transmission.
See all Digital/Satellite Radio »
Advanced Audio Processing
Using the Decibel - Part 5: The Phon, Audible Frequency Range, and THD
This final excerpt from the book "Sound System Engineering" covers topics including the phon, the audible frequency range (including a chart of the audible frequency range of various musical instruments), the acoustical meaning of harmonic distortion, and decibels and percentages.
DSP Tricks: Building a practical spectrum analyzer
Richard G. Lyons, author of "Understanding Digital Signal Processing," provides some useful tricks for implementing a spectrum analyzer by modifying the time-domain data before applying a radix-2 FFT algorithm.
Using the Decibel - Part 4: The VU and the VI Instrument
Part 4 of an excerpt from the book "Sound System Engineering" explains how dBm meters and VI instruments work, and how to read the VU Level on a VI instrument.
See all Advanced Audio Processing »
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AUDIO DESIGN CENTER ARCHIVE
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About the Audio DesignLine How-To Section
Audio DesignLine's How-To section delivers audio design tutorials and articles on designing audio electronics and audio processing functions for portable and home entertainment consumer electronics, professional audio, automotive sound, and digital/satellite radio.
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