Cuts are scenes in the movie, you want to delete, usually commercial breaks.

Generally:
You can create as many cuts in a movie as you want. Upon exiting the editing window, all cuts you created will be saved in a table and loaded again once you select this very movie again. Every movie is linked to its very own cut-definitions. If you delete the cuts in the section "Edit on HD" [remove cuts], all the stored cuts will be deleted from the table.

Error-correction during demultiplex:
Especially with audio, corrupted frames can be recognized and ignored. The corresponding video-frame will be skipped as well to keep synchronicity.

How DVR-topA is editing your movies

Generally: The receiver drive is divided into Clusters . According to the size of the harddisc, one Cluster has the following size:
up to 120GB=1MB, up to 180GB=1,5MB, up to 240GB= 2MB. Running time of one cluster is about 1,5 -3 seconds, varying by bitrate and cluster-size.

Using MPEG2, videodata is stored in a GOP. One GOP contains a full frame (red), followed by 12 packets of data (green), where the changes between the pictures are stored. According to the bitrate, 1 GOP contains about 400-800kB of data. Running time of 1 GOP is - according to bitrate - 0.5 seconds (PAL, German TV-System) or 0.44 seconds (NTSC, US-System).

How Topfield / Samsung ist editing a movie (Example #2):
Topfield edits using clusters. That means, that the exakt position of your cuts can vary by 1.5 - 3 seconds. Look at example #2: Cluster 3+4 have been deleted. That means, that the full frame inside Cluster 4 is missing - on playback, you will see artefacts (little squares). These artefacts will endure until the next full frame.
The advantage of this method of editing: very fast. The disadvantage: Vorteil: Schnelles Ausführen des Schnittes. Nachteil: inaccurate cuts and transitions.

How DVR-topA / DVR-samA is editing a movie: (Example #3-4)
The start of a cut is set exactly after a GOP of the MPEG-stream, accuracy is 0.5 seconds (PAL). The end of your cut is always set directly in front of a full frame. Look atexample #3: we deleted 6 full frames (next full frame is purple). Upon deleting pictures from the stream, the rest of the movie is attached to ensure continious streaming of data.
Advantage: Cuts are invisible and exact up to the frame. Disadvantage: time-consuming editing.

(For the future, we do plan to offer a choice between GOP and Cluster-cutting)

Upon clicking the button [new cut] you will add a new cut to the table of cuts. Now specifiy starting- and end-point.
Special feature: once the last cut is finished by clicking the button [End-Cut], you will be asked, whether you want to create a new cut when clicking the button [Start Cut]. Upon confirmation with [YES], a new cut will be created and the starting-point of the cut will be set.

Just click on the desired cut in the table of cuts to got to the desired position. You will be displayed the according blue bar inside the progress bar, including a still of the starting-point of the cut. The cursor is moved to the starting-point of the cut.

With the first click on a cut inside the table of cuts you will be taken to the starting point of the cut. Clicking again on the same cut, the still and the cursor will be moved to the end-point of the cut. If you continue to click, you are able to jump back and forward and thus control your cut.

TIP: You can edit the starting- and end-point of your cut by using this method to jump to the desired point. Click keys [ < ] [ > ] to edit the position of your cutting-point and set it with Button Start Cut / Button End Cut. This is especially helpful, if the movie is rewound a few seconds during a commercial break. By jumping back and forth to (and editing the starting- and end-points of your cut), you can achieve an exact transition.