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HDCP and DVR's > HDCP > Replies - Add Reply     Sort by newest posting on top
cdtv_admin@cdtv.ca 10/10/2021
11:16 AM
Comment from Admin.

I will seek the advice of my expert in this but offer the following comment in the interim.

1. HDCP is a protocol to ensure security between the DVI/HDMI port on the STB (of equivalent) and the related port of the device (such as the monitor) receiving the data. Thus non-HDCP devices will not receive data, but HDCP does not itself restrict the use of data in valid devices.

2. The rules for HDTV broadcasting in Canada are actually set by Industry Canada (technical ones) and the CRTC (programming ones.) CDTV makes recommendations to both, on behalf of its members and the industry. Currently, CDTV is recommending to the authorities that all DTV transmissions carry a minimum set of PSIP and that the Broadcast Flag be implemented to protect the broadcast content form further unauthorized broadcasting, while respecting the individual users rights to view it. Their may be some discussion here, as the Copyright laws in the USA and in Canada are somewhat different, but Canadian broadcasters certainly support the principle of restricting the unauthorized use of content for further disrtribution.

Watch this space for further news.

6:55 AM
Poker.lifer@yahoo.com wrote on 2021/12/28

HDCP Recording

Will the encoding make it impossible to record tv movies/programs?

Comment from Admin.

No, HDCP protects the program data between HDCP compliant devices and does not prevent appropriate recording. The Broadcast Flag in the SI and PSIP data of the program stream is to prevent unauthorized re-broadcasting of the program content but does not affect personal uses.

4:26 AM
Can you please define what you mean by:
- "does not prevent appropriate recording"
- "prevent unauthorized re-broadcasting" and...
- "does not affect personal uses"

Additionally who will determine what is authorized and what is unauthorized? (Not the same thing as legal vs illegal.)

How does HDCP prevent unauthorized re-broadcasting while ensuring that it does not affect personal uses?

How can it know? That would be like ensuring that my car never starts if I wanted to rob a bank, but always starts when I want to go to work. I don't see how it is possible for it to know what is authorized and what is unauthorized without interfering with my personal use.

I know that many Programmers, Broadcasters and Distributors want to protect copyrights, but they like to ignore the parts of copyright law that protect end users rights to Fair Dealing. Macrovision already tramples over this and hope that HDCP isn't going to be the same. I've lost count of the number of times I have returned a DVD to the video store for my money back because Macrovision has prevented me from watching it because my TV only has coaxial cable RF input, but my DVD player did not have that as a output. And if I have to go out and spend even more money on a third piece of hardware just to make two devices compliant to each other because of a broadcast flag... that is definitely interfering with personal use.

It is my understanding that recording HDCP will downgrade the quality of the HDTV signal so that it will then be the same quality as a VCR. Is that true? Because if it is, if you have a large screen TV then it will look so bad due to the video artifacts that it will not be watchable. That certainly sounds like it will interfere with personal use just like Macrovision already does.

10:39 PM
Hi, as i know there is another technology so called DVN-CPCM, if i am not mistaken, it should be using the similar technology as HDCP? correct me if i am wrong. just wonder is there any correlation between HDCP & DVB-CPCM? can this 2 technologies be applied together for broadcater?

12:11 PM
ke1vin_tan@yahoo.com wrote on 2021/03/12

Can these 2 technologies be used simultaneously?

Comment from Admin.

HDCP is the protocol used to protect the digital data in the connection from the decoder to the destination device (e.g. the display). DVB-CPCM (Content Protection and Content Management) is a DVB project to create and end-to-end system that encompasses digital broadcasting, consumer products, home networks and offers end-to-end protection of digital content. The two are positioned rather differently and the DVB approach would eventually subsume functionally HDCP if it were applied. It is not clear at present if DVB-CPCM could operate with an intermediate HDCP link. Comments from DVB would be interesting on this point.

12:29 PM
reimerk@unbc.ca wrote on 2021/03/07

Windows Media Center
This has probably been covered in the past, but here is my question. Is it possible to send the signal from a Bell expressvu 6100 reciever to a PC and run Windows XP Media Center?

Comment from Admin.

The BEV 610 has both analog component (Y, Pr, Pb) and digital (DVI) outputs that run simultaneously. The analog component output is unprotected and could be hooked to a suitable video card in your computer. The DVI output includes HDCP protection and any interface in your computer would have to respect that. It is not clear that windows Media Center can perform that function. Comments?

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