![]() As discussed earlier, this Frame Rate consumes bandwidth. This Frame Rate produces a continuous, uninterrupted Stream of video. ![]() Usually, an analog signal or video is sampled at 25 -30 Frames Per Second (FPS, not to be confused with “First Person Shooters” for the gamer). There are two simultaneous events occurring at the Encoder’s end which reduce the output bandwidth as a consequence. Obviously, you will be using a CODEC which both ends understand in terms of encoding / decoding it. The other part of CODEC is the Decoder which is available at the End User or Player’s end. This Encoder transforms Media Files into desired Formats as required for their digital transmission. Before we proceed further, let us remind you that a CODEC actually consists of two parts – one is the Encoder or coder which is present at the distribution end. The quality of the video comes down in this process, which is called sampling. The process of conversion from analog to digital by a Codec is called compression. There are thousands of Codecs in the market. To convert analog data to a digital signal we need something called CODEC – Coder and Decoder. This is where Progressive Download or Streaming comes into being. Only broadband allows transmission at higher rates. Earlier in the modem days, the bandwidth was actually 28.8 or even 14.4 kbps. This bandwidth has to be reduced to – say – 600 or700 kbps, in order to be transmitted. The question you may ask is “why cannot we transmit analog signals?” The bandwidth of an analog signal is very high and therefore it cannot be transmitted over normal cable or wire. This raw analog data or video has to be converted into digital data or video. Analog is a lossless recording media since all aspects of the video are captured. An analog signal is the raw video footage you take with an ordinary video recorder. First we must understand the difference between an analog and digital signal. This is a great opportunity to have a close look at Video Streaming in general. ![]() So, let’s look at what this technology is all about. ![]() Still, Progressive Download is a Technology which needs to be understood due to several reasons. Let’s assume that we are not really interested in that part of the world. But there is still a large part of this globe which survives on the old modem. Is this statement true? Probably yes if you are living in a technologically “advanced” Country. Progressive Downloads aka Pseudo Streaming aka HTTP Progressive Streaming Without further ado, let us have a dive into it. For although Progressive Downloads concludes our Formats’ speculation, it is indeed the oldest, Open Source approach to Streaming, leveraging HTTP‘s 206 support fro Byte Range requests. You may say: ”Hey! What is the deal with WMS Streaming, RTSP Streaming, ShoutCast, IceCast and so on?” You’re right indeed, my Reader, we are going to leave all other Streaming Formats/Technologies/Protocols out of this introductory Series for some god reasons: it is intended to be an Introduction to Streaming and therefore covers only the main, 2015 approaches to Streaming if we covered all ways to Stream content we’d easily end up writing into next year to the sake of Streaming Consultancy and as it pertains to CDNs Support of it, above mentioned Streaming approaches are considered “Legacy” nowadays or are supported in a very limited fashion last but not least, we’ll be happy to cover them in a future, more in-depth technical Series of Articles on Streaming Consultancy and so, please, bear with us until then.īack to today’s favourite of ours, Progressive Downloads concludes our journey – begun 6 Articles ago – around the Approaches to Streaming, and anticipates our next Article which instead will cover some typical Security Profiles associated to Streaming. Welcome back to our 7th and second last appointment with our Streaming Introduction Mini-Series, and the Streaming Technologies. ![]() Pseudo Streaming aka HTTP Progressive Streaming.Progressive Downloads aka Pseudo Streaming aka HTTP Progressive Streaming. ![]()
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