摘要:
To improve the sync code detection reliability while simplifying the sync code position detection process, when a first pattern as a combination of three successive sync codes (e.g., sync code numbers "2", "1", "0" in sync frame number "00") is compared with a second pattern in which the allocation of sync codes is shifted by one code from the first pattern (e.g., sync code numbers "1", "0", "1" in sync frame number "01"), two or more sync codes are changed (three codes are changed in this example).
摘要:
From an optical disc on which physical address information is recorded in the form of phase modulation of a groove wobble, a wobble signal is optically obtained which is affected by the groove wobble. The wobble signal is phase detected by a phase detector (32) and then fed into a low-pass filter (34). In a jitter calculator (51) the value of σ/T is calculated from the standard deviation σ of a jitter distribution obtained from the output of the low-pass filter and the period (T) of a symbol clock for the phase modulation to evaluate the recorded physical address information.
摘要:
From an optical disc on which physical address information is recorded in the form of phase modulation of a groove wobble, a wobble signal is optically obtained which is affected by the groove wobble. The wobble signal is phase detected by a phase detector (32) and then fed into a low-pass filter (34). In a jitter calculator (51) the value of σ/T is calculated from the standard deviation σ of a jitter distribution obtained from the output of the low-pass filter and the period (T) of a symbol clock for the phase modulation to evaluate the recorded physical address information.
标题翻译:Informisationshhstrustruktur,Informationsspeichermedium,Informationsaufzeichnungsverfahren,Informationswiedergabeverfahren und Informationswiedergabevorrichtung
摘要:
To improve the sync code detection reliability while simplifying the sync code position detection process, when a first pattern as a combination of three successive sync codes (e.g., sync code numbers "2", "1", "0" in sync frame number "00") is compared with a second pattern in which the allocation of sync codes is shifted by one code from the first pattern (e.g., sync code numbers "1", "0", "1" in sync frame number "01"), two or more sync codes are changed (three codes are changed in this example).