| 摘要 |
2068869 9205658 PCTABS00011 A read device (320) is disclosed for reading a record carrier (184) on which coded pictures (4TV, TV, TV/4) have been recorded. The recorded coded pictures represent pictures made up of a matrix of P rows of Q pixels (p). The dimension of the pixels in a horizontal direction is substantially equal to the dimension of the pixels in a vertical direction. A read unit (6) reads the recorded coded pictures (4TV, TV, TV/4) from the record carrier (184). The device comprises a picture converter, which preferably comprises a sample rate converter (290), for converting the read-out coded pictures into an adapted coded picture comprising P'xQ' coded pixels. The sample rate converter is arranged in a data path between the read unit (6) and a picture memory unit (321). The picture memory unit (321) supplies a coded picture representing a picture made up of pixels (p') whose ratio between the dimension in the horizontal direction and the dimension in the vertical direction is substantially equal to Q/P, P and Q being integers. The coded pictures supplied by the picture memory unit (321) are converted into a video signal suitable for a standard TV set. As a result of the use of a sample rate converter (290) the picture memory unit (321) can employ a picture memory (255) having the same number of rows and columns, which number is equal to a power of 2. Such memories can be constructed simply by means of commercially available memory circuits. Moreover, this yields a substantial reduction of the speed with which the coded picture information is extracted from the picture memory. In addition, through the use of the sample rate converter (290) it is simply possible to obtain a rotaed representation of the picture on a display screen with the display screen being filled correctly.
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