Difference between revisions of "Digital Television"

From MythTV Official Wiki
Jump to: navigation, search
(Added wikipedia link)
(Lirc Config Files for Converter Boxes)
Line 34: Line 34:
 
==== Lirc Config Files for Converter Boxes ====
 
==== Lirc Config Files for Converter Boxes ====
 
{{Note box| If you have a working config file for a digital converter box please attach it here for reference.}}
 
{{Note box| If you have a working config file for a digital converter box please attach it here for reference.}}
 +
Working Config for the RCA DTA800b:
 +
 +
begin remote
 +
 +
name  RCA_DTA800b
 +
bits          24
 +
flags SPACE_ENC
 +
eps            30
 +
aeps          250
 +
 +
header      3750  4206
 +
one          252  2240
 +
zero          252  1245
 +
ptrail        275
 +
gap    8292
 +
toggle_bit_mask 0x0
 +
 +
    begin codes
 +
        1                        0x7318CE
 +
        2                        0x7328CD
 +
        3                        0x7338CC
 +
        4                        0x7348CB
 +
        5                        0x7358CA
 +
        6                        0x7368C9
 +
        7                        0x7378C8
 +
        8                        0x7388C7
 +
        9                        0x7398C6
 +
        0                        0x7308CF
 +
        -                        0x76189E
 +
        menu                    0x7088F7
 +
        info                    0x73C8C3
 +
        ok                      0x7F480B
 +
        up                      0x7598A6
 +
        down                    0x7588A7
 +
        left                    0x7568A9
 +
        right                    0x7578A8
 +
        ch+                      0x72D8D2
 +
        ch-                      0x72C8D3
 +
    end codes
 +
 +
end remote
  
 
=== Digital broadcast cards ===
 
=== Digital broadcast cards ===

Revision as of 20:37, 2 October 2008

Wikipedia-logo-en.png
Wikipedia has an article on:

Introduction

Important.png Note: This page applies to United States users only. Official information on the change is found here

On February 19th, 2009, the United States will change from analog broadcast television to digital broadcast television. This change has some implications for MythTV users and this page will try to answer some of the most common questions and misconceptions. This table generalizes the situation

Type of service Need to change
Analog antenna/broadcast
Yes
Cable television
Maybe
Satellite television
No

Digital vs. HDTV

One common point of confusion is the use of digital television and HD television interchangeably. Digital television is simply the digital broadcast of TV signals compared to analog broadcast. Digital does not require a signal to be HD. HD is defined by the resolution of the content. Digital broadcasts can be in both SD (standard definition) and HD (high definition) formats.

Analog antenna/broadcast users

If you currently receive television using a standard antenna, you need to change equipment to continue to receive digital broadcasts. You have two basic options without changing to another type of service: digital converter, digital broadcast capture card.

Digital converters

These are set top boxes that you can get a coupon for from the government to convert the digital broadcast signal back to analog so your existing equipment does not have to change. This should work fine with MythTV, but might require use of an IR blaster to change channels and also require one converter per tuner in your system.

Lirc Config Files for Converter Boxes

Important.png Note: If you have a working config file for a digital converter box please attach it here for reference.

Working Config for the RCA DTA800b:

begin remote

name  RCA_DTA800b
bits           24
flags SPACE_ENC
eps            30
aeps          250
header       3750  4206
one           252  2240
zero          252  1245
ptrail        275
gap    8292
toggle_bit_mask 0x0
    begin codes
        1                        0x7318CE
        2                        0x7328CD
        3                        0x7338CC
        4                        0x7348CB
        5                        0x7358CA
        6                        0x7368C9
        7                        0x7378C8
        8                        0x7388C7
        9                        0x7398C6
        0                        0x7308CF
        -                        0x76189E
        menu                     0x7088F7
        info                     0x73C8C3
        ok                       0x7F480B
        up                       0x7598A6
        down                     0x7588A7
        left                     0x7568A9
        right                    0x7578A8
        ch+                      0x72D8D2
        ch-                      0x72C8D3
    end codes

end remote

Digital broadcast cards

These cards are commonly sold as HDTV capture cards. They will have various features such as ATSC support, QAM support, or 8VSB support. They may also advertise if they support OTA signals. For digital broadcast capture, OTA support is required. This is synonymous with 8VSB and should be what you look for when purchasing a card. This tuner is analogous to a typical analog capture card like a PVR-150 and would take the place of that card in a digital setup.

A good example of this card in a PCI format is the AverMedia A180 with additional information here

The digital converter coupons cannot be used for computer capture cards

Changing to digital capture will require changes to your lineup/video sources. This page may provide some guidance on how to proceed in scanning for digital channels and configuring the mapping of them to programming guides.

Cable TV users

There is no requirement from the government for changes to cable television in conjunction with the change to broadcast TV

That being said, many cable companies are taking advantage of the change to force users to change to digital services and require the use of a STB, set top box, in order to receive programming.

If your cable provider requires the use of a STB to receive all stations, then this change will affect your MythTV configuration. You should refer to the Recording Digital Cable page for additional information. Effectively, you will require one STB per tuner.

Satellite TV users

There is no change required by the government for satellite TV delivery