EP 0963625 A2 19991215 - RECEPTION OF VARIABLE AND RUN-LENGTH ENCODED DATA

Title (en)

RECEPTION OF VARIABLE AND RUN-LENGTH ENCODED DATA

Title (de)

EMPFANG VON LAUFLÄNGENKODIERTEN DATEN VARIABLER LÄNGEN

Title (fr)

RECEPTION DE DONNEES DE LONGUEUR VARIABLE ET CODEES PAR LONGUEUR DE LIGNE

Publication

EP 0963625 A2 19991215 (EN)

Application

EP 98957098 A 19981214

Priority

IB 9802040 W 19981214
US 67197 A 19971230

Abstract (en)

[origin: WO9935749A2] In a receiver, a variable-length decoder (VLD) derives run-value pairs (RVP) from variable and run-length encoded data (ED) such as, for example, MPEG-encoded data. A run-value pair (RVP) comprises a coefficient value (CV) and a run length (RL). The run length (RL) indicates a number (N) of zero coefficients (0) which precede the coefficient value (CV), N being an integer. A processing circuit (PRC) processes the run-value pairs (RVP) to obtain a decoded data stream (DD). The processing circuit (PRC) comprises a clock circuit (CLC) and a control circuit (CON). The clock circuit (CLC) generates clock cycles (CC) which are synchronous with the decoded data stream (DD). With each run-value pair (RVP) having a run length (RL) unequal to zero, the control circuit (CON) stalls the variable-length decoder (VLD) a number (N) of clock cycles (CC). The number (N) of clock cycles is proportional to the number (N) of zero coefficients indicated by the run length (RL). In such a receiver, the processing circuit (PRC) requires relatively little buffer memory, thus allowing cost-efficient implementations.

IPC 1-7

H03M 7/46

IPC 8 full level

H03M 7/42 (2006.01); G06T 9/00 (2006.01); H03M 7/46 (2006.01)

CPC (source: EP)

G06T 9/005 (2013.01); H03M 7/46 (2013.01)

Citation (search report)

See references of WO 9935749A2

Designated contracting state (EPC)

AT BE CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DOCDB simple family (publication)

WO 9935749 A2 19990715; WO 9935749 A3 19990916; CN 1252907 A 20000510; EP 0963625 A2 19991215; JP 2001515685 A 20010918

DOCDB simple family (application)

IB 9802040 W 19981214; CN 98804416 A 19981214; EP 98957098 A 19981214; JP 53587099 A 19981214