Lecture

Internship Report: Enhancing Video and Audio Quality

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Description

This lecture presents an internship report by a Digital Humanities Master's student at EPFL, detailing their experience at Logitech. The student discusses their project focused on no-reference video and audio quality assessment, particularly in the context of video conferencing and streaming. The lecture highlights the challenges users face in creating an ideal recording setup, which often requires professional knowledge about lighting, camera angles, and other factors affecting quality. To address this, the student developed a user-friendly tool that simplifies the process of improving streaming setups. The tool processes input video and audio streams separately and provides users with feedback on their quality, along with recommendations for Logitech devices. The student reflects on the inspiring nature of the project, the successful creation of a working prototype, and the valuable experiences gained during the internship, including participation in company events and collaboration with colleagues. The lecture concludes with gratitude towards the supervisor and the Logitech team for their support.

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Related concepts (32)

Digital audio

Digital audio is a representation of sound recorded in, or converted into, digital form. In digital audio, the sound wave of the audio signal is typically encoded as numerical samples in a continuous sequence. For example, in CD audio, samples are taken 44,100 times per second, each with 16-bit sample depth. Digital audio is also the name for the entire technology of sound recording and reproduction using audio signals that have been encoded in digital form.

Engineering

Engineering is the practice of using natural science, mathematics, and the engineering design process to solve problems, increase efficiency and productivity, and improve systems. Modern engineering comprises many subfields which include designing and creating infrastructure, machinery, vehicles, electronics, materials, and energy. The discipline of engineering encompasses a broad range of more specialized fields of engineering, each with a more specific emphasis on particular areas of applied mathematics, applied science, and types of application.

Audio signal processing

Audio signal processing is a subfield of signal processing that is concerned with the electronic manipulation of audio signals. Audio signals are electronic representations of sound waves—longitudinal waves which travel through air, consisting of compressions and rarefactions. The energy contained in audio signals or sound level is typically measured in decibels. As audio signals may be represented in either digital or analog format, processing may occur in either domain.

Streaming media

Streaming media is multimedia that is delivered and consumed in a continuous manner from a source, with little or no intermediate storage in network elements. Streaming refers to the delivery method of content, rather than the content itself. Distinguishing delivery method from the media applies specifically to telecommunications networks, as most of the traditional media delivery systems are either inherently streaming (e.g. radio, television) or inherently non-streaming (e.g. books, videotapes, audio CDs).

Latency (audio)

Latency refers to a short period of delay (usually measured in milliseconds) between when an audio signal enters a system and when it emerges. Potential contributors to latency in an audio system include analog-to-digital conversion, buffering, digital signal processing, transmission time, digital-to-analog conversion and the speed of sound in the transmission medium. Latency can be a critical performance metric in professional audio including sound reinforcement systems, foldback systems (especially those using in-ear monitors) live radio and television.

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