Image credit & licenceOverview
Rob Glaser (born 1962) founded Progressive Networks, later RealNetworks, and shipped RealAudio in 1995 — the first widely used system for streaming audio over ordinary dial-up internet connections. The quality was poor and the significance enormous: it established that media could be delivered as it played, rather than downloaded first.
What You Need
- Born 1962, United States
- Anchor year: 1995 — RealAudio
- Strand: canon
Steps
The problem as it stood
Audio and video on the early web had to be downloaded completely before playing. A few minutes of audio over a 14.4 kbit/s modem meant a wait of many minutes, which made the internet useless as a medium for anything time-based.
What he actually did
RealAudio combined aggressive low-bitrate speech-oriented coding with buffering and a tolerance for imperfection: play as the data arrives, buffer against jitter, and accept dropouts rather than stopping. RealVideo followed.
How it worked
Streaming trades quality and reliability for immediacy. A buffer of a few seconds absorbs network variation; if the connection cannot keep up the audio degrades rather than halting. That trade — accept a worse experience in exchange for starting now — is the founding assumption of every streaming service since.
What it made possible
Internet radio, and the demonstration that made everything after it plausible. Adaptive bitrate streaming, and eventually HLS and DASH, are refinements of the same trade with vastly more bandwidth available.
What happened to him
RealNetworks was dominant in streaming media in the late 1990s and was overtaken by Windows Media, QuickTime and then by Flash and HTTP-based streaming. He remained involved in technology and in political and philanthropic work.
Where the credit landed
Glaser is credited within the industry and is a slightly awkward fit for this corpus: his contribution is a product and a business rather than an invention, and RealNetworks is remembered as much for intrusive software as for the breakthrough. But the founding demonstration is real, and the fact that it sounded bad is central to why it mattered.
Pro Tips
- Streaming trades quality and reliability for immediacy — that is the founding assumption.
- A few seconds of buffer absorbs network variation.
- It sounded terrible, which is precisely what made the point.
Knowledge Base
What You'll Learn
The important demonstration was not that it worked well but that people accepted it.
Buffer, latency and the trade nobody escapes
A larger buffer absorbs more network variation and adds more delay before playback starts. That trade has never gone away: a live sports stream running thirty seconds behind broadcast is paying exactly the same tax RealAudio paid, with more bandwidth and better codecs. It is also why streaming still cannot match broadcast for genuinely live events, thirty years on.
Where This Fits
This guide covers one specific part of the history of media technology. The wider picture — how each link in the chain from capture through transmission to display was actually built, who built it, and why the credit so often landed somewhere else — is in A History of Broadcast Technology: The Chain From Capture to Screen, which frames the discipline as a whole and links out to the detailed guides underneath it, including this one. If you are starting from scratch rather than solving a specific problem, read that first and come back here.
FAQ
Q: What was RealAudio?
A: The first widely used streaming audio system, launched in 1995, which played audio as it arrived over ordinary dial-up connections instead of requiring a complete download first.
Q: Why does streaming still lag behind live broadcast?
A: Because streaming buffers to absorb network variation, and buffering means delay. Broadcast transmission has no equivalent requirement.