3. A decompression device as claimed in claim 2, wherein a counting element is provided for counting the data bits presented to said fourth shift register after the recognition of a horizontal code, and a comparison element for comparing the counting sum with a counting sum of a "make-up" or a "terminate" code word which is translated by the code word recognizer from a horizontal code word upon recognition thereof.
3. A decompression device as claimed in claim 2, wherein a counting element is provided for counting the data bits presented to said fourth shift register after the recognition of a horizontal code, and a comparison element for comparing the counting sum with a counting sum of a "make-up" or a "terminate" code word which is translated by the code word recognizer from a horizontal code word upon recognition thereof. 4. A decompression device as claimed in claim 3, wherein said fourth shift register has a first-in-first-out organization, the parallel output thereof being connected to a second communication bus together with the second read/write memory.