WCDTV IPTV Middleware Bedienungsanleitung PDF herunterladen (Seite 8)

Appendix A: HDMI 1.4a Features

HDMI 1.4a speciﬁcation established protocols for a number of popular 3D display methods, including:

• Frame, line, or ﬁeld alternative methods

• Side-by-side methods (full and half )

• 2D plus depth methods

3D video requires substantial data throughput, so a High Speed HDMI cable (with or without Ethernet) should be

used, although standard HDMI cables will support the broadcast 3D formats (top and bottom, side by side).

The HDMI 1.4a speciﬁcation has also added support for extremely high video resolutions that go far beyond

today’s 1080p displays. 4K is shorthand for 4,000 lines wide by 2,000 lines high, or roughly four times the resolu-

tion of a 1080p display [2]. Note that 4K resolution is 24p only, and therefore ﬁts within the maximum data rate

of a High Speed HDMI cable. Figure 2 shows the diﬀerence in quality between common display formats and 4K

resolution.

The Audio Return Channel in HDMI 1.4a enables a TV to send audio data “upstream” to an A/V receiver or sur-

round audio controller, eliminating the need for any separate S/PDIF audio connection [2].

• An Audio Return Channel-enabled TV can either send or receive audio via HDMI, upstream or down

stream, depending on system set-up and user preferences [2].

• LipSync functionality, introduced in HDMI 1.3, ensures that the audio stays matched to the video, auto

matically compensating for any processor delays whether the audio is traveling upstream or downstream

[2].

Figure 2: A visual example of 4K Resolution Acquired from HDMI LLC

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WCDTV IPTV Middleware Bedienungsanleitung Seite 8