Digital TV - evolution, status and challenges

Champ Yenchamp.yen@gmail.com

What is DTV?

Digital TV

Digital Broadcasting

What are involved with DTV today?

DTV History OverviewTraditional DTV Connected DTV Smart DTV

Tears of the Time …

What are the points of DTV?

Traditional DTV

Connected DTV

Smart DTV

Functionality

Connectivity

Flexibility

Evolution - Display● Resolutions

○ 480p => 720p => 1080p => 4K2K● Frequency

○ 30Hz => 60Hz => ... => 480Hz● Stereo View (3D Display)● Composition Layers

○ 2 => multiples● Colors

○ 8bit => 10bit

Evolution - Display

40 inch 50 inch 60 inch

Evolution - Displayresolution does matter!

Size, Distance & Resolution

https://www.synopsys.com/Company/Publications/SynopsysInsight/Pages/Art3-hdmi-2.0-IssQ3-13.aspx?cmp=Insight-I3-2013-Art3

What is Composition?

What are the > 30/60Hz Frequencies?

Evolution - input interface

● composite video connector● S-Video● D-Sub/DVI● HDMI/MHL● WIFI Display/Miracast

Evolution - Playback Capability

● DVB stream● Files

○ USB/Discs○ Network (NAS/DLNA)

● Specific Services○ Netflix○ Youtube, Spotify

Why is media type important?

● data throughput● latency● random access● reliability● error rate

Evolution - Playback Capability

● MPEG-1/2● MPEG-4● RealVideo● WMV● H.264/AVS● WebM VP8/VP9● HEVC

Evolution - Audio

● DTS/Dolby● Bitrate:

○ 128kbps => 384kbps => ... => lossless● Channels

○ stereo => 5.1 => 7.1 …

Evolution - Connectivity

● IR remote● USB● Ethernet● Bluetooth● WIFI

Platforms

● toolchain, api, driver, scalability, extensibility.● Real-Time OS● Linux

○ vendor-specific○ webOS○ Tizen○ Android

Evolution - Hardware

● Processor○ single => dual => quad

● DRAM○ SDRAM => DDR => DDR2 => DDR3○ MB => GB

● HW IPs○ GPU○ DSP○ Video decoder / encoder○ etc (eg.: scaler, MEMC)

Why do DTVs need powerful HW?

● Computation● Bandwidth● Latency● Resolution● 3D

Problem of Connected TV

● Content● Applications● TV manufacturer focus on HW sales rather

than SW functionality maintenance.

Problem of Smart TV

Manufacturer Platform

Apple Apple TV

Google Android TV

SONY Android TV

Sharp SmartCentral

Panasonic VIERA

Samsung Samsung Smart TV

LG WebOS

NO SINGLE STANDARD, PLATFORM

Settop Box

● depends on content providers● extend the capability of TV

The cooperative devices of DTVHDMI dongle

Settop Box / DVR

PC/NB

NAS Gaming

Disc Player

Smartphone/Tablet

Current Situation of DTV in Mobile Era

● Even Google, Apple did NOT propose successful platform in DTV marketing.

● Smart devices (Phones, Tablets)● IoT● Linear => non-linear● content => Internet

The influence of TV

http://www.fool.com/investing/general/2014/07/28/2-factors-leading-to-the-demise-of-cable-tv.aspx

The influence of TV

http://www.forbes.com/sites/roberthof/2014/04/10/online-ad-revenues-blow-past-broadcast-tv-thanks-to-mobile-and-video/

The Challenges of DTV

● smart devices/APPs● Wireless/Mobile Network● MOD/VOD● Controller

The Power of Smartphone/Tablet.

The Challenges of DTV- remote control

The remote controller design may be a key point of SmartTV.

Q & A