'The hrws tag found in the name
HR = High Resolution
WS = Wide Screen
PD TV = Pure Digital Television
:returns: an empty string if not found'

@property
def hrws(self):

    attr = u'hrws'
    match = None
    if (self.avc and (self.tv == u'pd')):
        regex = re.compile(u'(hr.ws.pdtv).{0}'.format(self.avc), re.I)
        match = self._get_match_obj(attr, regex)
    return (u'' if (not match) else match.group())
