MediaTech: TV Tech: The Evolution of TV (W11-P3) [VID] Fa16

We've covered a variety of theories that explain the development and diffusion of media technologies (e.g. diffusion and technological determinism).  Let's now start to add another to our list.  Let's start to look at how technologies evolve.  Are there similarities between the biological theory of evolution and technological theory of evolution?

First, briefly what is the theory of evolution and how might it be applied to the evolution of media technologies, like TV?  




How has TV evolved?  When watching this what changes do you spot?  What features change?
Is it helpful to think of media technology evolving?

Along with Winston's model, Diffusion of Innovations, etc., we've now added the evolution of tech as another theory that helps explain how and why media tech develops and spreads throughout society.  We'll cover a little more on this theoretical perspective a little later.

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MediaTech: TV Tech: How HDTV Works (W11-P3) [VID] Fa16

Now let's move to HDTV and answer such questions like what's that 1080 stuff?



Nowadays, you don't need a separate receiver.





The newest TV tech out there is UHDTV.

Ultra-high-definition television (also known as Ultra HD television or UHDTV) includes two types (1) 4K UHD (3840 pixels wide by 2160 pixels tall or 8.3 megapixels) and 8K UHD (7680 pixels wide by 4320 pixels tall or 33.2 megapixels).

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MediaTech: TV Tech: How Cable TV Works (W11-P2) [VID] Fa16

How does/did cable TV work?  Steps in the process?




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MediaTech: TV Tech: How TV Works (More Recent) (W11-P1) [VID] Fa16

In the past we've looked at how early TV worked.  Let's now move to more recent times.

How does TV work?  What are steps in the process?

Let's first look at the "humped-back" TVs.

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MediaTech: TV/Radio Tech (Basics): How Early TV Worked (W7-P3) [VID] Fa16

How did* TV work?  What were the steps in the process?  

For next video start at about 40 seconds in.


If you are interested: "The Origins of Television" Discovery Channel clip

*Some of the same principles still apply to today's TV tech.

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MediaTech: TV/Radio Tech (Basics): How Radio Works (W7-P2) Fa16

Before talking about how radio works, it is first helpful to understand the electromagnetic spectrum.  What is the electromagnetic spectrum?




Now, how does radio fit into this?  What does it have to do with the spectrum?  The following video provides a good overview.




Now some detail from decades ago. While the specific tech shown is from decades ago, the basic principles still apply today. Spot the steps in signal processing?




For a quick summary on how radio works, see this quick video below.  What new pieces of info are added here?





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HistMedia: Spotlight On Hedy Lamar (W12-P3) Fa15

Here recently was the 101st birthday of actress and technologist/inventor, Hedy Lamarr.
Google even made note of Lamarr with an animated doodle on their search page.
What was her story?  What did she invent still relevant to today's communication technologies?




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HistMedia: TV Technologists: Farnsworth, Sarnoff & Zworykin (W12-P2) Fa15

Now let's return to our discussion of media technologists, the creators, the inventors of media.

Previously we studied the creation of radio by looking at the lives of de Forest, Armstrong and Sarnoff.

Next, we turn to TV technologists.  Note that Sarnoff returns to play a role in the beginnings of television too.

While Sarnoff did play an important role in the beginnings of TV, note that Sarnoff is more on the business side of things as he was with radio.  Who are the key inventors that deserve attention when talking about the beginnings of TV?

Here we study the creation of TV via a recent National Geographic Channel documentary titled AMERICAN GENIUS FARNSWORTH VS. SARNOFF.



Note that, as clearly stated at the beginning of the film, this NGC doc "includes dramatizations inspired by history."


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MediaTech: TV Tech: How HDTV Works (W11-P4) [VID] Fa15

Now let's move to HDTV and answer such questions like what's that 1080 stuff?



Nowadays, you don't need a separate receiver.





The newest TV tech out there is UHDTV.

Ultra-high-definition television (also known as Ultra HD television or UHDTV) includes two types (1) 4K UHD (3840 pixels wide by 2160 pixels tall or 8.3 megapixels) and 8K UHD (7680 pixels wide by 4320 pixels tall or 33.2 megapixels).


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MediaTech: TV Tech: The Evolution of TV (W11-P3) [VID] Fa15

How has TV evolved?  When watching this what changes do you spot?  What features change?
Is it helpful to think of media technology evolving?
Along with Winston's model, Diffusion of Innovations, etc., we'll add the evolution of tech as another theory that helps explain how and why media tech develops and spreads throughout society.  More on this later.

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See more about me at my web site WilliamHartPhD.com.

MediaTech: TV Tech: How Cable TV Works (W11-P2) [VID] Fa15

How does/did cable TV work?  Steps in the process?





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MediaTech: TV Tech: How TV Works (More Recent) (W11-P1) [VID] Fa15

In the past we've looked at how early TV worked.  Let's now move to more recent times.

How does TV work?  What are steps in the process?

Let's first look at the "humped-back" TVs.




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MediaTech: TV/Radio Tech (Basics): How Early TV Worked (W7-P3) [VID] Fa15

How did TV work?*  How did early TV work?  What was the process?  What are the steps?



For next video start at about 40 seconds in.


If you are interested: "The Origins of Television" Discovery Channel clip

*Some of the same principles still apply to today's TV tech.

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MediaTech: TV/Radio Tech (Basics): How Radio Works (W7-P2) Fa15

Before talking about how radio works, it is first helpful to understand the electromagnetic spectrum.  What is the electromagnetic spectrum?




Now, how does radio fit into this?  What does it have to do with the spectrum?  The following video provides a good overview.



Now some detail from decades ago. While the specific tech shown is from decades ago, the basic principles still apply today. Spot the steps in signal processing?



For a quick summary on how radio works, see this quick vid.





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See more about me at my web site WilliamHartPhD.com.

MediaTech: TV Tech: How HDTV Works (U8-P4) [VID] Fa14

Nowadays, you don't need a separate receiver.





The newest TV tech out there is UHDTV.

Ultra-high-definition television (also known as Ultra HD television or UHDTV) includes two types (1) 4K UHD (3840 pixels wide by 2160 pixels tall or 8.3 megapixels) and 8K UHD (7680 pixels wide by 4320 pixels tall or 33.2 megapixels).




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See more about me at my web site WilliamHartPhD.com.

MediaTech: TV Tech: The Evolution of TV (U8-P3) [VID] Fa14

How has TV evolved?  When watching this what changes do you spot?  What features change?
Is it helpful to think of media technology evolving?
Along with Winston's model, Diffusion of Innovations, etc., we'll add the evolution of tech as another theory that helps explain how and why media tech develops and spreads throughout society.  More on this later.


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MediaTech: TV Tech: How Cable TV Works (U8-P2) [VID] Fa14

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MediaTech: TV Tech: How TV Works (More Recent) (U8-P1) [VID] Fa14

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MediaTech: TV/Radio Tech (Basics): Pixels, Persistence of Vision, etc. (U5-P3) [VID] Fa14

Pixels and Persistence of Vision

"One time I tried to take a picture of my favorite television show and the photo only showed about a quarter of the picture on the screen. Why did that happen?"   Read the rest on this web page. See the interactive graphics as well.

Black and White TV Screens

"We keep talking about these little dots. What are they made of, anyway?"  Read the rest on this web page.  See the interactive graphics as well.

Bright and Dark

"Now I have two more questions! First, how does the electron beam move around to different parts of the screen? And second, how do you get gray pictures out of light and dark phosphors?"  Read the rest on this web page.  See the interactive graphics as well.



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MediaTech: TV/Radio Tech (Basics): How Early TV Worked (U5-P2) [VID] Fa14

How did TV work?*  What is the process?  What are the steps?



For next video start at about 40 seconds in.


If you are interested: "The Origins of Television" Discovery Channel clip

*Some of the same principles still apply to today's TV tech.


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Please follow, add, friend or subscribe to help support this blog.
See more about me at my web site WilliamHartPhD.com.